Rep. Mike Quigley Michael (Mike) Bruce QuigleyDemocrats introduce legislation to revise FDA requirements for LGBT blood donors Tucker Carlson sparks condemnation with comments about deadly Kenosha shooting Hillicon Valley: Three arrested in Twitter hack | Trump pushes to break up TikTok | House approves 0M for election security MORE (D-Ill.) says that special counsel Robert Mueller's apparent focus on former national security adviser Michael Flynn in his investigation into Russia's election meddling is a sign that "karma can be very difficult."

In an interview with CNN on Friday, Quigley pointed to Flynn's past comments deriding former Democratic presidential candidate Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE as a criminal, suggesting that the tables could very well have turned.

"I hearken back to ... a year-and-a-half ago to the convention in Cleveland. I think it was Gen. Flynn that led the cheers 'lock her up, lock her up,' referring to Mrs. Clinton," Quigley said.

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"And at the same time, he and President Trump said anyone who seeks immunity must be guilty. Well, I don't believe that, but we're aware of his efforts to seek immunity. So, if anything, we're learning this morning that karma can be very difficult."

Quigley's comments came after The New York Times reported on Thursday that attorneys for Flynn have stopped cooperating with lawyers defending President Trump in Mueller's investigation.

That Flynn's lawyers have cut ties with Trump's team suggests that the former national security adviser may be cooperating with Mueller, who is investigating Russia's role in the 2016 election, and, in particular, whether the Trump campaign colluded with Russian officials or representatives.

Flynn has long been a central figure in the law enforcement investigation into Russia's election meddling. He resigned from his White House post in February after it was revealed that he misled Vice President Pence and others about his conversations with then-Russian Ambassador Sergey Kislyak in the month before Trump took office.

He has since registered as a foreign agent with the Justice Department — a move that came after his financial ties to Russia and Turkey came under scrutiny.

Flynn previously offered to testify before the Senate Intelligence Committee in exchange for immunity from prosecution. The panel rejected that request.