A lawyer for the Rhode Island GOP is asking the state Ethics Commission to review an allegation that Gov. Gina Raimondo’s chief of staff threatened an executive for Twin River.

In an amendment to a state Republican Party complaint filed in July, former Republican Chairman Brandon Bell said the issue could buttress the GOP’s claim that Raimondo’s support for an extension for IGT benefited the company’s former chairman, Donald Sweitzer, who lobbied for IGT after leaving as chairman. He was also picked by the governor to serve as treasurer of the Democratic Governors Association, a group she currently chairs.

"This is just another unfounded claim tacked on to an already baseless complaint from the GOP, and we remain confident that the Ethics Commission will dismiss it," said Jonathan Berkon, a Washington, D.C.-based lawyer for Raimondo.

The governor’s chief of staff, Brett Smiley, last week denied that he made a threat against Twin River Executive Vice President Marc Crisafulli.

The backdrop: Raimondo’s support for a $1 billion no-bid 20-year extension for IGT Global Solution, the company that now provides most of Rhode Island’s gambling services. Twin River, which operates casinos in Lincoln and Tiverton, is trying to convince lawmakers to let it bid for the work now done by IGT.

In his amended complaint, Bell makes the case for a review of the clash between Smiley and Crisafulli – a story that emerged as part of a consent agreement between the state and Twin River.

“Assuming the evidence provided by Twin River is credible, the Ethics Commission should require, and if necessary subpoena Smiley and others in the Raimondo administration to testify and provide all documentation in relation to Twin River’s debt financing to determine if a threat was made and retaliation inflicted upon Twin River in order to further passage of legislation to financially benefit IGT and IGT’s lobbyist and probable shareholder, Sweitzer,” Bell wrote.

The Ethics Commission voted in August to investigate the GOP complaint against Raimondo. At the time, Jonathan Berkon, a Washington, D.C.-based lawyer for the governor, called the case baseless.

Bell wrote that if the commission elects not to review the matter involving Crisafulli and Smiley, “the Ethics Commission would be sending a signal to the public that it either views Twin River as a habitual liar or that it is ethical for a chief of staff to threaten a company in order in order to help pass legislation which will financially benefit his boss’s business associate.