Appearing on Fox News Sunday, the Republican senator from South Carolina said Sessions needs to return to the Senate Judiciary Committee to testify whether Trump's campaign arranged meetings with Russia and President Vladimir Putin.
"Jeff, you need to tell us everything you know about Russia. So yeah, he probably should come back, and answer the question yet again 'did you know anything about an effort by the Trump campaign to meet with Russia, not just collude with Russia,'" Graham told host Chris Wallace.
Graham said his questions stemmed from a March 2016 meeting where former campaign adviser George Papadopoulos offered to set up a meeting between Trump and Putin
"So we now know that somebody at a meeting, Mr. Papadopoulos, raised the idea of meeting with Putin. There's nothing wrong with Trump meeting with Putin if he wanted to. It would be wrong to have the Russians help the Trump campaign or Hillary Clinton's campaign," he said.
"He now needs to come back before the committee, in person, under oath, to explain why he cannot seem to provide truthful, complete answers to these important and relevant questions," Leahy said.