A Justice Department spokeswoman tells NPR that Sessions requested it be public.
Sen. Jack Reed, D-R.I., said "there's a real question of the propriety" of Sessions' involvement in Comey's dismissal, because Sessions had stepped aside from the federal investigation into contacts between Russian Federation and the Trump campaign.
The former Republican US senator from Alabama, one of Mr. Trump's most avid supporters on the campaign trail, will likely have to explain why he told lawmakers in January he had no dealings with Kremlin officials previous year.
Mr. Sessions' testimony before the Senate Intelligence Committee, scheduled to start at 2:30 p.m., has the potential for high drama as the Russian Federation probe continues to dominate USA politics, sidelining President Trump's domestic agenda.
That's because in his confirmation hearing he said one thing in front of the American people - that he hadn't had meetings with the Russian ambassador during the campaign - and the facts showed that he did.
Pressure mounted at the start of the week following reports that Sessions offered his resignation to Trump because the President blamed Sessions for exacerbating his Russian Federation problems by recusing himself from the probe. Is there any way to ask about it in open session?
But intelligence committee members at first were unaware of a planned hearing. The Justice Department has denied that, saying Sessions stressed to Comey the need to be careful about following appropriate policies.
Comey also has said Sessions did not respond when he complained he didn't "want to get time alone with the president again". Memos that he had written in the course of his official government duties about privileged conversations with the President.
Where it goes from there we don't know yet.
She said Sessions should also testify before the Judiciary Committee, because it was better suited to explore legal questions of possible obstruction.
A Trump confidant, Chris Ruddy, told "PBS NewsHour" on Monday that the president was weighing whether to fire the special counsel now heading up the investigation, former FBI Director Robert Mueller.
"The way that it was handled, with no follow-up, with no other press, with no other return to that topic, It looks like what I called a pretty light touch" Lankford also said on "Face the Nation" in reference to the February 14 conversation.
Senate Majority Whip John Cornyn, an intelligence committee member, said senators were still deciding whether Sessions would be asked to testify in a classified briefing after the public hearing.
Trump is scheduled to visit a technical college in Waukesha, Wisconsin, on Tuesday, and then deliver a policy speech at the Labor Department on Wednesday.
During a news conference in the Rose Garden of the White House Friday, when the president was asked if tapes exist of his private conversations with Comey, he told reporters they'll be "disappointed" with his answer.