Rep. Matt Gaetz of Florida is calling for Robert Mueller to resign as the special counsel investigating Russia’s interference in the 2016 US election. Gaetz cites a lack of charges relating to a 2010 uranium deal approved by US government agencies under Mueller’s watch as the reason.

WASHINGTON – A group of conservative Republican lawmakers introduced a resolution on Friday calling for Robert Mueller to recuse himself as the special counsel investigating Russia’s interference in the 2016 US election and whether President Donald Trump’s campaign team colluded with Moscow.

Reps. Matt Gaetz of Florida, Andy Biggs of Arizona, and Louie Gohmert of Texas say Mueller should step down because he was the FBI director in 2010 when US government agencies approved the sale of Uranium One, a Canadian energy company, to a Russian nuclear-energy firm. The deal required approval because Uranium One had mining operations in the US.

Gaetz says the issue is that Mueller’s FBI had found evidence of criminal activity that may have been relevant to the deal but did not bring any charges, and that Mueller therefore should recuse himself from the current investigation.

“These deeply troubling events took place when Mr. Mueller was the Director of the FBI. As such, his impartiality is hopelessly compromised,” Gaetz said in a statement. “He must step down immediately.”

Many of Gaetz's Republican colleagues, however, have previously expressed support for Mueller and his investigation. Senate Republicans have even introduced bills to create a barrier between Trump and Mueller in the event the president attempts to fire him.

Some conservatives have latched on to the Uranium One deal recently, pointing to a report tangentially tying the deal to the 2016 Democratic presidential nominee, Hillary Clinton, who was the secretary of state at the time, and her husband, former President Bill Clinton.