Trump, Flynn once criticized Clinton aides for seeking immunity

Flynn has asked for "assurances against unfair prosecution" in Russia probes.

"The reason they get immunity is because they did something wrong, if they didn’t do anything wrong, they don’t think in terms of immunity," he said at a rally in Wisconsin last September.

For his part, Flynn told NBC's "Meet the Press" in September of the aides involved in the Clinton probe, “When you are given immunity, that means you probably committed a crime.”

House and Senate intelligence committees are investigating Russian interference in the 2016 election and alleged contacts between the Trump campaign and the Russian government. Flynn is in discussions to testify in both investigations, according to his lawyer, Robert Kelner.

"General Flynn has a story to tell, and he very much wants to tell it, should the circumstances permit," said Kelner on Thursday evening.

Kelner confirmed that the "discussions have taken place" but would not comment on the details.

"Notwithstanding his life of national service, the media are awash with unfounded allegations, outrageous claims of treason, and vicious innuendo directed against him," Kelner said. "No reasonable person, who has the benefit of advice from counsel, would submit to questioning in such a highly politicized, witch hunt environment without assurances against unfair prosecution."