British Prime Minister Boris Johnson gives a thumbs-up as he arrives back at 10 Downing Street from the Houses of Parliament in London, Tuesday, Oct. 29, 2019. Britons will be heading out to vote in the dark days of December after the House of Commons on Tuesday backed an early national vote that could break the country's political impasse over Brexit — or turn out to be merely a temporary distraction. (AP Photo/Matt Dunham)

LONDON (AP) — Britons will be heading out to vote in the dark days of December after the House of Commons on Tuesday backed an early national vote that could break the country's political impasse over Brexit — or turn out to be merely a temporary distraction.

Prime Minister Boris Johnson hopes electing a new crop of lawmakers will give his Conservative Party a majority and break the stalemate that blocked his plan to take Britain out of the European Union this month. This week the EU granted Britain a three-month Brexit extension until Jan. 31.

But after three years of inconclusive political wrangling over Brexit, British voters are weary and the results of an election are hard to predict.

The House of Commons voted 438-20 — with dozens of lawmakers abstaining — for a bill authorizing an election on Dec. 12. It will become law once it is approved Wednesday by the unelected House of Lords, which does not have the power to overrule the elected Commons.

Even before the result was announced, the political parties were in campaign mode.

Johnson — who has had to abandon his vow to lead Britain out of the EU on Oct. 31 "do or die" — accused his opponents of seeking to frustrate voters' decision to leave the EU and prolong the Brexit process "until the 12th of never."

"There is only one way to get Brexit done in the face of this unrelenting parliamentary obstructionism, this endless, willful, fingers crossed, 'not me guv' refusal to deliver on the mandate of the people — and that is to refresh this Parliament and give the people a choice," Johnson said.

The road to polling day opened up when the main opposition Labour Party, which had opposed three previous attempts by Johnson to trigger an election, changed its position.

Now that Brexit has been delayed, Labour leader Jeremy Corbyn said his party would vote in favor of an early election because the prospect that Britain could crash out of the EU without a divorce deal had been taken off the table.

Brexit will form the unavoidable backdrop to the election, but the left-of-center Labour Party is calculating that voters will want to talk about issues such as health care, education and social welfare — all of which saw years of funding cuts by Conservative governments — more than about Brexit. The party's position on the EU is convoluted, with a split between those who want to go through with Brexit and those who want a new referendum on whether to remain in the bloc.

The strongly pro-EU Liberal Demcorats have been eating away at Labour support in Britain's big cities.

"The choice at this election could not be clearer," Corbyn said in a statement that did not mention Brexit. "A Labour government will be on your side, while Boris Johnson's Conservatives — who think they're born to rule — will only look after the privileged few."

The looming vote comes two and a half years before the next scheduled election, due in 2022, and will be the country's first December election since 1923.

Lawmakers rejected an attempt by the Labour Party to hold the election on Dec. 9. The party argued the earlier date would mean more students could vote because universities would not have begun their Christmas holidays.

Cabinet Office Minister Oliver Dowden said Dec. 12 was preferable because it gave lawmakers a few more days to finish up parliamentary business, and retained Britain's tradition of holding elections on Thursdays.

Earlier, a last-minute hitch to the government's plans emerged when opposition parties announced plans to try to amend the terms of an early election to lower the voting age from 18 to 16 and expand the voting base to include citizens of the 27 other EU nations who are living in Britain.

The government said it would abandon the bill if that plan succeeded. The amendments were not chosen for a vote by parliamentary authorities, who judged that they would have fundamentally altered the legislation.

Johnson took office in July vowing to "get Brexit done" after his predecessor, Theresa May, resigned in defeat. But the Conservative leader, who said just weeks ago that he would "rather be dead in a ditch" than postpone the Oct. 31 Brexit date, was forced by Parliament to seek the extension in order to avoid a no-deal Brexit, which would damage the economies of both Britain and the EU.

Johnson plans to campaign as a leader who has a viable, strong Brexit plan for the country but who has been stymied by an anti-democratic opposition and a bureaucratic EU.

He has argued that without an early election, the British government would be like the cartoon character Charlie Brown, "endlessly running up to kick the ball only to have Parliament whisk it away."

An election is a risk, though, not only for Johnson's Conservatives but also for Labour. Opinion polls currently give Johnson's Conservatives a lead, but there's a strong chance that an election could produce a Parliament as divided over Brexit as the current one.

Theresa May called an early election in 2017 with the aim of boosting the Conservatives' majority and strengthening her hand in negotiations with the EU. The party ended up losing its majority in Parliament, and May failed to pass her key Brexit measures.

Many voters are fed up with politicians from all sides after more than three years of Brexit drama, and all the parties are worried about a backlash from grumpy voters asked to go to the polls at the darkest, coldest time of the year.

"We all know that a poll in December is less than ideal," said Pete Wishart, a lawmaker with the opposition Scottish National Party. "But it is worth that risk in order that we remove this prime minister."

Meanwhile, the Brexit conundrum remains unsolved — and the clock is ticking down the new deadline of Jan. 31.

"To my British friends," European Council President Donald Tusk tweeted Tuesday. "The EU27 has formally adopted the extension. It may be the last one. Please make the best use of this time."

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Associated Press writer Samuel Petrequin in Brussels contributed to this report.

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Follow AP's full coverage of Brexit and British politics at https://www.apnews.com/Brexit

In this photo provided by the UK Parliament, Britain's Prime Minister Boris Johnson talks during the debate on the Early Parliamentary General Election Bill in the House of Commons, London, Tuesday, Oct. 29, 2019.  After months of stalemate in Parliament, Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit. Opposition lawmakers backed in principle the government's request to send voters to the polls in December —though Prime Minister Boris Johnson still faced a tussle over the exact date. (UK Parliament/Jessica Taylor via AP)
British Prime Minister Boris Johnson arrives back at 10 Downing Street from the Houses of Parliament in London, Tuesday, Oct. 29, 2019. Britons will be heading out to vote in the dark days of December after the House of Commons on Tuesday backed an early national vote that could break the country's political impasse over Brexit — or turn out to be merely a temporary distraction. (AP Photo/Matt Dunham)
A man arranges Union flags and an Ulster Banner outside the Houses of Parliament on the day that Members of Parliament debated whether or not to hold a General Election to resolve the Brexit deadlock, in London, Tuesday, Oct. 29, 2019. Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit, after the main opposition Labour Party said it would agree to the government's request to send voters to the polls in December. (Luciana Guerra/PA via AP)
In this photo provided by the UK Parliament, Britain's Labour leader Jeremy Corbyn talks during the debate on the Early Parliamentary General Election Bill in the House of Commons, London, Tuesday, Oct. 29, 2019.  After months of stalemate in Parliament, Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit. Opposition lawmakers backed in principle the government's request to send voters to the polls in December —though Prime Minister Boris Johnson still faced a tussle over the exact date. (UK Parliament/Jessica Taylor via AP)
Britain's Prime Minister Boris Johnson leaves 10 Downing Street on his way to the Houses of Parliament in London, Tuesday, Oct. 29, 2019. Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit, after the main opposition Labour Party said it would agree to the government's request to send voters to the polls in December. (AP Photo/Frank Augstein)
In this image taken from video British Prime Minister Boris Johnson speaking in the House of Commons, London, Tuesday Oct. 29, 2019. Britain is on course for a December general election after Jeremy Corbyn announced that Labour's conditions to back the move had been met. (House of Commons via AP)
A pumpkin with the words
A pedestrian walks past pro-Brexit demonstrators outside Parliament in London, Tuesday, Oct. 29, 2019. The leader of the U.K.'s opposition Labour Party told fellow lawmakers Tuesday that he'll back an early election for Britain now that the prospect of crashing out of the European Union without a deal has been taken off the table. The move by Jeremy Corbyn pushes the country closer to its first December election since 1923. (AP Photo/Kirsty Wigglesworth)
European Union flags fly outside Parliament in London, Tuesday, Oct. 29, 2019. The leader of the U.K.'s opposition Labour Party told fellow lawmakers Tuesday that he'll back an early election for Britain now that the prospect of crashing out of the European Union without a deal has been taken off the table. The move by Jeremy Corbyn pushes the country closer to its first December election since 1923. (AP Photo/Kirsty Wigglesworth)
Pedestrians pass Brexit banners opposite parliament in London, Tuesday, Oct. 29, 2019. The leader of the U.K.'s opposition Labour Party told fellow lawmakers Tuesday that he'll back an early election for Britain now that the prospect of crashing out of the European Union without a deal has been taken off the table. (AP Photo/Frank Augstein)
A pro-Brexit supporter wears Union flag decorated glasses and a hat as he demonstrates outside Parliament in London, Tuesday, Oct. 29, 2019. The leader of the U.K.'s opposition Labour Party told fellow lawmakers Tuesday that he'll back an early election for Britain now that the prospect of crashing out of the European Union without a deal has been taken off the table. The move by Jeremy Corbyn pushes the country closer to its first December election since 1923. (AP Photo/Kirsty Wigglesworth)
An anti-brexit demonstrator holds a banner outside Parliament in London, Tuesday, Oct. 29, 2019.  The leader of the U.K.'s opposition Labour Party Jeremy Corbyn told fellow lawmakers Tuesday that he will back a December general election for Britain now that the prospect of crashing out of the European Union without a deal has been taken off the table.  (AP Photo/Kirsty Wigglesworth)
In this photo provided by the UK Parliament, British Members of Parliament vote in favour of the Creasy amendment to the Election Bill, in the House of Commons, London, Tuesday, Oct. 29, 2019.  After months of stalemate in Parliament, Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit. Opposition lawmakers backed in principle the government's request to send voters to the polls in December —though Prime Minister Boris Johnson still faced a tussle over the exact date. (UK Parliament/Jessica Taylor via AP)
In this photo provided by the UK Parliament, British Member of Parliament Stella Creasy proposes her amendment to the General Election Bill, in the House of Commons, London, Tuesday, Oct. 29, 2019. After months of stalemate in Parliament, Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit. Opposition lawmakers backed in principle the government's request to send voters to the polls in December —though Prime Minister Boris Johnson still faced a tussle over the exact date. (UK Parliament/Jessica Taylor via AP)
In this photo provided by the UK Parliament, Britain's Prime Minister Boris Johnson talks during the debate on the Early Parliamentary General Election Bill in the House of Commons, London, Tuesday, Oct. 29, 2019.  After months of stalemate in Parliament, Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit. Opposition lawmakers backed in principle the government's request to send voters to the polls in December —though Prime Minister Boris Johnson still faced a tussle over the exact date. (UK Parliament/Jessica Taylor via AP)
Pro-Brexit leave the European Union supporters demonstrate backdropped by the Houses of Parliament in London, Tuesday, Oct. 29, 2019. Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit, after the main opposition Labour Party said it would agree to the government's request to send voters to the polls in December. (AP Photo/Matt Dunham)
An anti-Brexit remain in the European Union protester wears illuminating lights with her badges opposite the Houses of Parliament in London, Tuesday, Oct. 29, 2019. Britain appeared on course Tuesday for an early general election that could break the country's political deadlock over Brexit, after the main opposition Labour Party said it would agree to the government's request to send voters to the polls in December. (AP Photo/Matt Dunham)