Comey had last week said that he believed Trump asked him to end an investigation into former national security adviser Michael Flynn, which Trump has denied.
That remark came after revelations emerged that Sessions had met with Russia's ambassador to the US last year, despite testifying under oath during a confirmation hearing that he "did not have communications with the Russians". Democratic Senator Ron Wyden, an intelligence committee member, asked the panel's leaders in a letter on Sunday to hold an open hearing.
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 past year.
The president's tendency to bring up the Russian Federation investigation, whether by insulting Comey or suggesting the existence of tapes, has created a headache for members of his party who want to put Republican priorities, including healthcare and tax reform, front and center.
"(Sessions) believes it is important for the American people to hear the truth directly from him and looks forward to answering the committee's questions tomorrow", a Justice Department spokesperson said.
The high-stakes testimony also takes place amid reported friction between Sessions and Trump, who criticized the attorney general's decision to recuse himself in the Russian Federation probe.
The New York Democrat added that the Senate would also consult with special counsel Robert Mueller, who has taken the lead on a wide-ranging investigation into the alleged Russian interference in the 2016 elections. "They sent a separate request to Trump's White House counsel, Don McGahn, for any record the White House had of their meetings". Barring the emergence of evidence such as a surreptitious recording of the conversation - Trump tweeted that Comey had better hope there are no tapes - deciding which of the two men's accounts is factual may depend on which details most accurately reflect others' recollections. "Next question", Trump said during a news conference, when a reporter asked him about the Times story.
Russian opposition figure Navalny jailed for 30 days
The outspoken opposition leader has announced that he would run for the presidency in the 2018 election. Spicer called on the Russian government to immediately release all peaceful protesters.
A political commentator and former communications chief during the George W. Bush presidency had some harsh words for Donald Trump Jr. following James Comey's pivotal testimony. The Justice Department has denied that, saying Sessions stressed to Comey the need to be careful about following appropriate policies.
Comey's dramatic testimony drew invective from his former boss on Twitter, with Trump dismissing him as a leaker on Friday and a coward on Sunday.
Trump has denied allegations of collusion between his campaign and Russian Federation and said he never directed Comey to drop the Flynn probe. "The more he says, the more he risks being called out for inconsistencies".
When Comey was sacked, King pointed out, Sessions had already recused himself from the Russian Federation investigation.
At a separate hearing Tuesday, Deputy Attorney General Rod Rosenstein declared he'd seen no basis for dismissing Mueller, the former Federal Bureau of Investigation director he appointed as special counsel after Sessions' recusal.
"The leaders of the House Russia investigation, Reps".
"That's just not going to be acceptable", said Sen.