One person familiar with Trump's thinking said – in addition to believing he is entirely innocent – part of what's fueling the President's willingness to participate is his belief that he has experience with lawsuits and testifying under oath from his time in the real estate business, according to CNN.

"He thinks he can work this," this person said. "He doesn't realize how high the stakes are."

As UNIAN reported earlier, special counsel Robert Mueller's investigators interviewed U.S. Attorney General Jeff Sessions in connection with the wide-ranging inquiry into Russia's interference in the 2016 election and whether President Trump sought to obstruct justice.