He is expected to be asked about questions raised by last week's testimony from James Comey. And, finally, Comey raised some questions about why Sessions played a role in his firing last month if Sessions were truly hands-off on the Russian Federation probe.
But this April, when he was trying to play down Bannon's importance, he said "I didn't know Steve" and "he was not involved in my campaign until very late".
The Secret Service, declared that it has no tapes of White House conversations, acting in response to a freedom of information request by The Wall Street Journal.
He declined to speak with a reporter from The Record newspaper.
Trump has held several campaign rallies since becoming president, including events in Kentucky and Tennessee.
U.S. Attorney General Jeff Sessions will appear Tuesday at a public hearing before the Senate Select Committee on Intelligence to testify in the investigation into Russian tampering in the 2016 presidential election.
"These are dark times if the attorney general of the United States is unwilling to answer questions under oath in an open session about his conduct or defend this administration's budget", Schatz said in a statement. The White House has denied any collusion with Moscow.
Mr Comey told the panel that on Feb 14, the president had made private comments to Mr Comey in the Oval Office that he interpreted as an improper order to drop a criminal investigation into former national security adviser Michael Flynn.
"He 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", DOJ spokeswoman Sarah Isgur Flores said in a statement.
There was some uncertainty about whether the hearing would be open or closed, but Sessions apparently requested it "be public", according to the Justice Department.
Sessions, an early and ardent supporter of U.S. President Donald Trump's 2016 election campaign, would be the highest government official to testify before the Senate intelligence committee in its probe of allegations that Russian Federation may have sought to interfere in the election.
He recused himself from the federal probe in March after acknowledging that he met twice previous year with the Russian ambassador to the United States.
The Intelligence Committee should try to pin Sessions down on his own contacts with Russian officials as a Trump campaign surrogate, what he knows about other campaign contacts with Russians and why he failed to be fully forthcoming with Congress in the past.
The former Republican senator took over the Justice Department with a tough-on-crime agenda that included quashing illegal immigration, rooting out drug gangs and leading the charge in helping cities fight spikes in violence.
Comey additionally expressed that FBI leadership believed Sessions would "inevitably" recuse himself and that they "were aware of facts that I can't discuss in an open setting that would make his continued engagement in a Russia-related investigation problematic".
Democratic operative Scott Ferson, former press secretary to U.S. Sen. Dianne Feinstein of California has said there should be further investigation.
In addition, Comey has said Sessions did not respond when he complained that he did not want to be left alone with Trump again. The president said Comey was sacked because of Russian Federation. That investigation continues, as do congressional inquiries.