The president has denied that he has any nefarious ties to Russian Federation and has also disputed that he's attempted to block the investigation into his campaign's possible role in Russia's election-related hacking.
Among them are James Quarles and Jeannie Rhee, both of whom Mueller brought over from his old firm, WilmerHale.
"My thinking was if i write it in such a way that I don't include anything that would trigger a classification, that'll make it easier for us to discuss within the Federal Bureau of Investigation and the government and to hold onto it in a way that makes it accessible to us", Comey told Sen.
The memos to Trump transition and campaign officials came in the wake of former FBI Director Robert Mueller's appointment as special counsel to oversee the investigation into Russian election meddling and ties between Trump campaign associates and Russian officials.
Mueller's friendship with Comey and Mueller's selection of several investigators who have made campaign donations to Democrats are among the issues Gingrich is raising as problematic. "And to the best of my recollection, during that same period of service, I do not recall ever feeling pressured to do so".
The meeting was reportedly part of a White House effort to review Mueller, a former FBI Director, as a potential replacement for Comey at the bureau.
The president didn't clarify what exactly he was referring to in the early morning tweet, however he has frequently described reports about possible ties between members of his campaign and Russian Federation as a "witch hunt". "Witch Hunt", the president wrote in his tweet.
Trump wrote, "You are witnessing the single greatest WITCH HUNT in American political history - led by some very bad and conflicted people!"
A spokesman for Mueller's team declined to comment. Americans should be skeptical about anonymous allegations.
Mark Corallo, speaking on behalf of the president's personal attorney, Marc Kasowitz, dismissed the news report as an unlawful leak.
A source on Trump's legal team attempted to clarify the missive, claiming he was reacting to media reports about the investigation rather than offering public confirmation.
The White House has directed questions for details to outside legal counsel, which has not responded. Trump said in a follow-up message. President Donald Trump's closest allies are attacking the integrity of those involved in the wideni.