Story highlights Sen. Jack Reed called Sessions' involvement in Comey's firing "highly questionable"

He said Sessions will be asked about a possible third meeting with the Russian ambassador

(CNN) A Democratic senator who will question Attorney General Jeff Sessions at tomorrow's Senate intelligence committee hearing wants to know why he was involved in the decision to fire former FBI director James Comey after he had recused himself from the Russia investigation.

"I think it's important to establish why he was involved in the dismissal of Director Comey since he had recused from, apparently, all matters related to the Russia investigation, and (President Donald Trump) himself has indicated that he, indeed, based his dismissal of Comey on the Russia Investigation," Rhode Island Sen. Jack Reed said on CNN's "Erin Burnett OutFront." "The attorney general's involvement is highly questionable, to be blunt, and I think those questions will be raised."

The White House initially cited memos from Sessions and Deputy Attorney General Rod Rosenstein recommending Comey's firing over his handling of the Hillary Clinton email probe as the reason for his dismissal, and did not mention the Russia investigation. Trump later said in an interview with NBC News's Lester Holt that he was going to fire Comey "regardless of the recommendation" and that he was thinking of the investigations into Russian involvement in the 2016 election when he decided to let the FBI director go.

Sessions will answer lawmakers' questions on those matters Tuesday at the hearing. Reed said he expects Sessions to be asked if he was aware that Trump was factoring Comey's handling of the Russia investigation in his decision to fire Comey. And, if Sessions was aware of the President's rationale, Reed said he expects that senators will ask why he did not remove himself from discussions about Comey.

Asked if he thinks Sessions will answer these questions, Reed said, "I don't know frankly. I would hope that he would answer the questions."

Read More