Sen. John Kennedy John Neely KennedyMORE (R-La.) tore into former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE on Wednesday, accusing the former law enforcement official of being a "hack politician" and suggesting he was headed for his own legal troubles.

Kennedy went after Comey in an interview on Fox News, hours after the former FBI director told "CBS This Morning" that GOP lawmakers should "breathe into a paper bag" and stop making accusations that the FBI conducted "spying" on the Trump campaign in 2016.

"I think it's clear to most Americans that Mr. Comey is not and never was a law enforcement professional," the Republican senator said. "He's just a hack politician. It doesn't give me any joy to say that."

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“Mr. Comey and others tried to put their thumbs on the scale and he has hurt a lot of people and he has hurt a lot of important institutions to our system of government in the process,” Kennedy added. “I think Mr. Comey is lashing out now because he knows what’s coming.”

The GOP senator also pushed back during the interview against Democrats' accusations that Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE had misled Congress with his summary of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe, an assertion he called "ludicrous."

Comey had blasted Barr during the CBS interview for comments the attorney general made during a Senate hearing earlier this year when he declared that he believed "spying" had occurred targeting President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's campaign during the 2016 election.

"Yeah, I have no idea what he's talking about. The FBI doesn't spy, the FBI investigates," Comey said Wednesday. "We investigated a very serious allegation, that Americans might be hooked up with the Russian effort to attack our democracy."

"The Republicans need to breathe into a paper bag," Comey added in the interview. "If we had confronted the same facts with a different candidate, say, a Democratic candidate, where one of their advisers was talking to a foreign adversary's representative, about that adversary interfering in our election, they'd be screaming for the FBI to investigate it."

Republicans, including Trump, have accused Comey and other members of the intelligence and law enforcement community of initiating surveillance measures against the Trump campaign without proper reasoning, arguing that the FBI's probe into Russia's election interference was predicated on an unverified dossier funded by the Clinton campaign.

GOP lawmakers have signaled they intend to look into surveillance by FBI agents. The Justice Department's inspector general is also probing the FBI's compliance with procedures and laws during the probe.

Comey and other law enforcement officials have maintained that the investigation began after a former Trump campaign aide, George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE, told an Australian official that Russia was in possession of damaging information related to Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE, the Democratic nominee. The tip was later passed on to the FBI.