Sessions, among the earliest high-profile backers of Trump's election campaign, appears before his former colleagues Tuesday, days after explosive testimony by ousted FBI director James Comey, whose removal he recommended.
Concerns have been raised about whether Sessions helped otherwise subvert the ongoing Russia-related investigations.
"This is going to prompt a lot of questions for him," the panel's top Democrat, Senator Patrick Leahy, told AFP of an appearance in which lawmakers will be eager to learn what role Sessions played in Comey's firing last month.
"In light of reports regarding Mr Comey's recent testimony before the Senate Select Committee on Intelligence, it is important that I have an opportunity to address these matters," Sessions said in a letter announcing the change.
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The intelligence panel "is the most appropriate forum for such matters, as it has been conducting an investigation and has access to relevant, classified information," he added.
And in a stunning moment of inside-the-Beltway intrigue, Comey dropped a bombshell about why he and other top FBI officials concluded that the attorney general was going to recuse himself from the probe.
"We also 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," Comey said.
Although Sessions, a genteel 70-year-old from the southern state of Alabama who served 20 years in the Senate, backed Trump's campaign, he was also one of the first administration officials to fly into turbulence. During his January confirmation hearing he failed to disclose meetings he held with Russian officials.
The following day, Sessions recused himself from the Russia probe, and several top Democrats, including House Minority Leader Nancy Pelosi, demanded he resign. Sessions refused.
He may also be under a cloud of suspicion after Comey, in his devastating testimony, suggested the attorney general may have failed to take appropriate steps to protect the FBI chief.
At the conclusion of a February 14 meeting in the White House, Comey testified, Trump urged everyone else but Comey to leave the Oval Office, including Sessions.
"My sense was the attorney general knew he shouldn't be leaving," Comey added.
When the two men were alone, the ex-FBI director said, Trump urged Comey to stop the investigation into fired national security advisor Michael Flynn.