Apart from what he said, one GOP lawmaker wants to know how and why Michael Flynn's conversation with a Russian ambassador ever saw the light of day in the first place, The Washington Post reported.

House Intelligence Committee Chairman Devin Nunes, R-Calif., plans to pose that question to the FBI.

"I expect for the FBI to tell me what is going on, and they better have a good answer," Nunes told the Post. "The big problem I see here is that you have an American citizen who had his phone calls recorded."

And then leaked.

The real story here is why are there so many illegal leaks coming out of Washington? Will these leaks be happening as I deal on N.Korea etc? — Donald J. Trump (@realDonaldTrump) February 14, 2017

Flynn, President Trump's short-lived national security adviser, resigned late Monday night for deceiving Vice President Mike Pence about the nature and timing of his calls with the Russian ambassador to the U.S.

Those recordings led the Justice Department to warn the White House that Flynn had misled the president et al and could be vulnerable to blackmail attempts by the Russians.

Though Russians' calls are routinely recorded, it's unclear if Flynn was being monitored by intelligence agencies, the Post reported.

While Nunes is concerned with the how, ranking Senate Republicans are calling for investigations into what exactly Flynn discussed with the Russians and who, if anybody, put him up to it.