Britain's Prime Minister Boris Johnson speaks during an election campaign event for his ruling Conservative Party at the NEC, (National Exhibition Centre) in Birmingham, England, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Frank Augstein)

LONDON (AP) — Prime Minister Boris Johnson told British voters Wednesday that they have to back his Conservatives if they want an end to Brexit delays, as he tried to shake off a rocky start to the governing party's election campaign.

Speaking outside his No. 10 Downing St. office on the first official day of Britain's five-week campaign, Johnson said the political impasse over Britain's departure from the European Union made him want to "chew my own tie in frustration."

"I don't want an early election, and no one much wants to have an election in December, but we have got to the stage where we have no choice," he said.

Johnson, trying to set the stage for a people-versus-Parliament campaign, said lawmakers were "refusing time and again to deliver Brexit and honor the result of the referendum."

In fact, lawmakers approved Johnson's EU divorce deal in principle last month, but asked for more time to scrutinize it. Johnson then withdrew the bill and pushed for an early election instead.

Johnson also slammed his main rival, left-wing Labour Party leader Jeremy Corbyn, comparing him to former Soviet dictator Joseph Stalin and — erroneously — claiming he had sided with Russian President Vladimir Putin over a nerve-agent attack on British soil.

All 650 seats in the House of Commons are up for grabs in the Dec. 12 election, which is coming more than two years early. Some 46 million British voters are eligible to take part in the country's first December election in 96 years.

Johnson urged voters to deliver a Conservative majority so Britain could "put uncertainty behind us." With that support, Johnson vowed he would get Parliament to ratify his Brexit deal and the country would leave the EU as scheduled on Jan. 31.

Brexit was supposed to happen on Oct. 31, but with Britain's politicians deadlocked, the bloc granted the U.K. a three-month delay.

While unofficial campaigning has been ramping up for weeks, the campaign formally began when Parliament was dissolved Wednesday. Johnson went to Buckingham Palace to notify Queen Elizabeth II of the dissolution before unveiling the party's election slogan — "Get Brexit done and unleash Britain's potential" — at a rally in the central England city of Birmingham.

The Conservative campaign has had a bumpy start. Just minutes before Johnson spoke Wednesday, Cabinet Minister Alun Cairns resigned over allegations about a former aide's role in a rape trial.

Cairns said he was quitting as Welsh secretary because of "speculation" surrounding the "very sensitive matter," which is under investigation. He said he was confident he would be cleared of wrongdoing.

Cairns denies allegations that he knew his former staffer Ross England made claims about a victim's sexual history when he was a witness in a 2018 rape trial. That is not allowed, and the trial collapsed. The judge accused England of deliberately sabotaging the trial. Cairns later endorsed England as a candidate for an upcoming Welsh Assembly election.

On Tuesday, another Conservative, outgoing House of Commons leader Jacob Rees-Mogg, was forced to apologize for suggesting that the victims of a 2017 London apartment block inferno that killed 72 people lacked common sense for following fire department advice to wait in their apartments for help.

The comments drew sharp rebukes from opposition politicians — and from rap star Stormzy, who urged the Conservative lawmaker to resign and tweeted: "These politicians are actual aliens."

The Conservatives were also criticized for posting a doctored video of a senior Labour figure on Twitter that appeared to show him failing to answer a question, when in fact he did. Conservative Party chair James Cleverly claimed Wednesday the ad was just "a lighthearted satirical video."

In another over-the-top political insult, Johnson used a column in the Daily Telegraph to accuse the Labour Party under Corbyn of attacking the rich "with a relish and vindictiveness not seen since Stalin persecuted the kulaks," the wealthier peasants targeted by the Soviet regime in the 1930s.

In his Downing Street speech, Johnson also claimed inaccurately that Corbyn had "sided with Putin" after a former Russian spy and his daughter were attacked with a nerve agent in the English city of Salisbury.

Corbyn initially asked for "incontrovertible evidence" that Moscow was behind the 2018 attack, as Britain's Conservative government had insisted. He later said he believed Russia was responsible for the poisoning.

Other parties in the race include the Liberal Democrats, who want to cancel Brexit; the Scottish National Party, which opposes Brexit and wants Scotland to leave the U.K.; and the Brexit Party, which says Britain should leave the bloc without a deal.

The Labour Party has its own woes, with many of the party's lawmakers uneasy about Corbyn's firm left-wing views and ambivalence over the EU. On Wednesday, deputy leader Tom Watson, who has often clashed with Corbyn, announced that he was stepping down from politics.

Watson acknowledged his "political differences" with Corbyn in a resignation letter but said the decision was personal rather than political.

Labour wants to shift the election debate away from Brexit and onto domestic issues such as health care, the environment and social welfare, saying it will reverse Britain's increasing social inequality.

Corbyn has labelled Johnson's economic plans "Thatcherism on steroids," in reference to the free-market, low-spending ideology of the late former Conservative Prime Minister Margaret Thatcher.

"I don't do personal attacks," Corbyn told supporters in Telford, central England. He said, if elected, he would be "a very different kind of prime minister."

"I was not born to rule," Corbyn said, contrasting himself with the affluent, Oxford University-educated Johnson. "I don't pursue the kind of politics that thinks it's all a game, a parlor game, a debating society game."

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

Britain's Prime Minister Boris Johnson speaks in Downing Street, London, on Wednesday, Nov. 6, 2019, ahead of the formal start of the General Election. Britain's five-week election campaign officially began Wednesday, when Parliament was dissolved ahead of the Dec. 12 vote. (AP Photo/Kirsty Wigglesworth)
Britain's Prime Minister Boris Johnson leaves 10 Downing Street on route to Buckingham Palace ahead of an audience with Queen Elizabeth II and the formal start of the General Election, in London, Wednesday, Nov. 6, 2019.(Stefan Rousseau/Pool Photo via AP)
Britain's opposition Labour party leader Jeremy Corbyn delivers a speech during their election campaign event on Brexit in Harlow, England, Tuesday, Nov. 5, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Matt Dunham)
Britain's Liberal Democrat leader Jo Swinson visits a mental health enterprise in North London, Wednesday Nov. 6, 2019. Britain's three major national political parties wooed weary voters on Tuesday, all promising an end to Brexit wrangling if they win next month's national election — but offering starkly different visions of how to achieve that. (Aaron Chown/PA via AP)
Britain's Prime Minister Boris Johnson walks to leave 10 Downing Street on route to Buckingham Palace ahead of an audience with Queen Elizabeth II and the formal start of the General Election, in London, Wednesday, Nov. 6, 2019. (Stefan Rousseau/Pool Photo via AP)
Britain's Liberal Democrat leader Jo Swinson, left, walks with the party's candidate for Finchley and Golders Green Luciana Berger as she arrives for a visit to a mental health enterprise in North London, Wednesday Nov. 6, 2019. Britain's three major national political parties wooed weary voters on Tuesday, all promising an end to Brexit wrangling if they win next month's national election — but offering starkly different visions of how to achieve that. (Aaron Chown/PA via AP)
A street cleaner clears autumn leaves from the front of 10 Downing Street, in London, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Alastair Grant)
Britain's Prime Minister Boris Johnson leaves 10 Downing Street on route to Buckingham Palace to see Queen Elizabeth II to formally start the general election in London, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec.12. (AP Photo/Alastair Grant)
Britain's Prime Minister Boris Johnson leaves 10 Downing Street on route to Buckingham Palace to see Queen Elizabeth II to formally start the general election in London, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec.12. (AP Photo/Alastair Grant)
Brexit Party leader Nigel Farage during a public rally at a miner's social club in Nottingham, England, Tuesday Nov. 5, 2019.  Britain's Brexit split with Europe is one of the main issues as the country goes to the polls in a General Election on Dec. 12. (Joe Giddens/PA via AP)
An effigy of Britain's Prime Minister Boris Johnson, left, and Leader of the House of Commons Jacob Rees-Mogg, during the annual bonfire night procession in the town of Lewes, Britain, Tuesday Nov. 5, 2019.  The annual event traditionally includes high-profile political characters, with Britain's Brexit split with Europe being one of the main issues as the country goes to the polls in a General Election on Dec. 12. (Gareth Fuller/PA via AP)
The sun sets behind the Hoses of Parliament on the final day of the house sitting before lawmakers start the general election campaign in London, Tuesday, Nov. 5, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Alastair Grant)
Brexit Party leader Nigel Farage reacts during a public rally at a miner's social club in Nottingham, England, Tuesday Nov. 5, 2019.  Britain's Brexit split with Europe is one of the main issues as the country goes to the polls in a General Election on Dec. 12. (Joe Giddens/PA via AP)
Britain's Prime Minister Boris Johnson walks from the front door of number 10 to deliver a speech in Downing Street, London, on Wednesday, Nov. 6, 2019, ahead of the formal start of the General Election. Britain's five-week election campaign officially began Wednesday, when Parliament was dissolved ahead of the Dec. 12 vote. (AP Photo/Kirsty Wigglesworth)
Britain's Prime Minister Boris Johnson speaks in Downing Street, London, on Wednesday, Nov. 6, 2019, ahead of the formal start of the General Election. Britain's five-week election campaign officially began Wednesday, when Parliament was dissolved ahead of the Dec. 12 vote. (AP Photo/Matt Dunham)
Britain's Prime Minister Boris Johnson speaks in Downing Street, London, on Wednesday, Nov. 6, 2019, ahead of the formal start of the General Election. Britain's five-week election campaign officially began Wednesday, when Parliament was dissolved ahead of the Dec. 12 vote. (AP Photo/Kirsty Wigglesworth)
Britain's Prime Minister Boris Johnson speaks during an election campaign event for his ruling Conservative Party at the NEC, (National Exhibition Centre) in Birmingham, England, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Frank Augstein)
Britain's Prime Minister Boris Johnson speaks during an election campaign event for his ruling Conservative Party at the NEC, (National Exhibition Centre) in Birmingham, England, Wednesday, Nov. 6, 2019. Britain goes to the polls on Dec. 12. (AP Photo/Frank Augstein)