On Wednesday, Comey released his planned opening statement to the committee which included his request of Sessions that the attorney general "prevent any future direct communication" between himself and Trump.
Attorney General Jeff Sessions will testify in public session at 2:30 p.m. Tuesday before the Senate Intelligence Committee for its ongoing probe into Russia's interference in last year's presidential election.
No time has been scheduled for Sessions to testify separately in a closed hearing to discuss classified matters, according to Senate aides, who were not authorized to speak publicly on the matter.
In March, Sessions recused himself from any investigations into Russia's actions in the 2016 campaign.
Multiple sources confirmed that the president was disappointed with the attorney general's recusal - a decision Trump only learned about minutes before it was announced in March.
Sessions will also be prepared to describe the process of filling out his SF-86 security clearance form in 2016 - specifically, the advice he received from Federal Bureau of Investigation personnel that he didn't need to include all of the meetings he had with foreign officials in his capacity as a sitting senator, the source said. Kamala Harris, D-Calif., asked Comey a series of questions about Sessions' involvement in the Russian Federation investigation during the two weeks between Trump expressing his "hope" that Comey could let go of the probe into former national security adviser Michael Flynn and Sessions' recusal from inquiries related to the election. Sessions could be asked about that part of Comey's testimony, as well as his role in Comey's firing last month.
Members of both the Senate and House intelligence committees have insisted since that hearing that it is important they verify Comey's testimony.
Asked Monday if the White House thought Sessions should invoke executive privilege to avoid answering questions about his conversations with Trump, presidential spokesman Sean Spicer replied, "It depends on the scope of the questions". And, if Comey was sacked because of the burden of the Russian Federation investigation - as the president has now suggested - was it appropriate for Sessions to be involved in that decision, given his recusal? ".The president's been clear, last week in the Rose Garden, that he believes that the sooner we can get this addressed and dealt with, that there's been no collusion - he wants this to get investigated as soon as possible and be done with it so he can continue with the business of the American people".
In addition to the Senate Intelligence Committee investigation on Russia, special counsel Robert Mueller is leading an independent inquiry into Russia's election meddling and potential links between Russians and the Trump campaign.
"As NPR's Carrie Johnson recently reported on All Things Considered: "[Sources] are telling me Trump has been very angry with Jeff Sessions for recusing himself in the Russian Federation investigation to begin with, lots of profane conversations and yelling. He said under oath at his January confirmation hearing that he had not met with Russians during the campaign. "We've obviously pressed the White House", he said. Attorney General-designate, Sen. Jeff Sessions, testifies on Capitol Hill in Washington, D.C., January 10, 2017, at his confirmation hearing before the Senate Judiciary Committee.
Sessions is likely to be asked about his conversations with Ambassador Sergey Kislyak and whether there were more encounters that should have been made public.