A Democratic senator on Thursday disputed President Trump’s claim that the Russia probe was the “single greatest witch hunt” in American history, arguing the Salem witch trials of the 17th century were worse.

“I have family ancestors from the Boston area and I think the Salem witch hunt has to be the greatest witch hunt in American history,” Sen. Chris CoonsChristopher (Chris) Andrew CoonsThe Hill's Coronavirus Report: The Hill's Reid Wilson says political winners are governors who listened to scientists and public health experts; 12 states record new highs for seven-day case averages Hillicon Valley: Facebook takes down 'boogaloo' network after pressure | Election security measure pulled from Senate bill | FCC officially designating Huawei, ZTE as threats Democrats, voting rights groups pressure Senate to approve mail-in voting resources MORE (D-Del.) told CNN's "The Situation Room with Wolf Blitzer."

Coons’s comment came hours after Trump called the investigation into Russia’s meddling in the 2016 presidential election and possible ties between his campaign staff and Russia the “single greatest WITCH HUNT in American political history.”

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“They made up a phony collusion with the Russians story, found zero proof, so now they go for obstruction of justice on the phony story. Nice,” Trump wrote on Twitter.

“You are witnessing the single greatest WITCH HUNT in American political history - led by some very bad and conflicted people!" Trump wrote, adding a hashtag for his "Make America Great Again" slogan.

Coons in the television appearance argued that it will be difficult for Trump to “change the subject” from the FBI’s Russia investigation because special counsel Robert Mueller has bipartisan support.

“One of the things that President Trump is going to run into here as he tries to change the subject is the fact that Bob Mueller commands very wide bipartisan support here in the senate and in Washington generally,” Coons said.

The Democratic senator noted that Mueller, who led the FBI under former Presidents George W. Bush and Barack ObamaBarack Hussein ObamaNeil Young updates song 'Lookin' for a Leader' opposing Trump, endorsing Biden Bellwether counties show trouble for Trump Trump may be DACA participants' best hope, but will Democrats play ball? MORE, was “one of the most respected federal law enforcement leaders.” 

“And although he may try to change the subject to Hillary ClintonHillary Diane Rodham ClintonTrump to visit Georgia next week Former NY Rep. Claudia Tenney to face Anthony Brindisi in House rematch Powell takes on Trump over Confederate flag MORE and the investigation into her emails during last year’s campaign, the fact that there is a significant investigation moving forward lead by former FBI Director Mueller, is what I would encourage the president to focus on,” Coons said. 

Trump on Thursday afternoon also questioned why former Democratic presidential nominee Hillary Clinton was not the subject of Russia-related investigations.