During that meeting, Comey said that the president asked him to end the FBI's investigation into former National Security Adviser Lt. -Gen.
Wyden accused Sessions of stonewalling and asked about matters relating to his recusal from the Russian probe that were 'problematic'.
The former Alabama senator put in a shaky performance under questioning from his former colleagues during his confirmation hearing. And he can expect questions about his involvement in Comey's May 9 firing, the circumstances surrounding his decision to recuse himself from the FBI's investigation, and whether any of his actions - such as interviewing candidates for the FBI director position or meeting with Trump about Comey - violated his recusal pledge.
And then a special counsel was appointed to continue the probe.
Though the Justice Department maintains that it has fully disclosed the extent of Sessions' foreign contacts a year ago, lawmakers have continued to press him for answers about an April 2016 event at the Mayflower Hotel in Washington, where both Sessions and Kislyak attended a foreign policy speech by Trump.
Following the May meeting in Oslo, North Korea urgently requested another meeting, which took place last week between the USA envoy on North Korea, Joseph Yun, and the North's ambassador at the U.N.in NY.
Sessions replied, "I am not stonewalling".
He said he would agree to dismiss Mueller only if there were a legitimate basis to do so, and an order from the president would not necessarily qualify. "Whether I ever attended a reception where the Russian Ambassador was also present is entirely beside the point of this investigation into Russian interference with the 2016 campaigns", he said. "I have been called a surrogate at a time or two in that campaign and I didn't have - did not have communications with the Russians, and I'm unable to comment on it", end quote.
He says Comey's decision to announce the results of the investigation without Justice Department approval was "a stunning development" because "the FBI is the investigative team".
Mr Sessions testified about his dealings with Russian officials and whether he intentionally misled Congress.
He recused himself from the Justice Department's Russian Federation probe in March.More news: Boulder declares intent to uphold Paris climate goals
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Regarding his March 2 recusal, Sessions said he not briefed on the investigation into Russian Federation, "which is ongoing today", except as it was relevant for him to make the decision to recuse himself.
- Can you describe being kicked out of the Oval Office by Trump so that that the president could speak alone with Comey?
It will be the first sworn public testimony from Sessions, a longtime former senator, since he was confirmed as the nation's top law enforcement officer in February, and comes as political intrigue pulses through the United States capital following explosive testimony by Comey last week.
Sessions is the most senior member of Trump's administration caught up in the controversy over whether associates of the president colluded with Russian Federation to help Trump win the election.
"Well, some of that leaked out of the committee that he said in closed session", Sessions said.
Spicer, the spokesman, declined to say then that Sessions enjoyed Trump's confidence, though spokeswoman Sarah Huckabee Sanders said later in the week that the president had confidence "in all of his Cabinet".
In his defense, Sessions could cite a memo written by Deputy Attorney General Rod Rosenstein that criticized Comey over the Hillary Clinton email investigation.
His impassioned response came after Senate Democrats raised questions about whether Sessions privately met with Sergey Kislyak at an April 2016 foreign policy event at the Mayflower Hotel in Washington.
"I recused myself from any investigation into the campaigns for President, but I did not recuse myself from defending my honor against scurrilous and false allegations", Sessions said.
Sessions denied the Mayflower meeting took place. He denied any ties between Donald Trump's campaign and Russian Federation, and told senators he was never filled in on the hacking details. "Now people get to hear it directly, and I think they'll be very impressed", odd concluded. He is looking to increase economic and diplomatic pressure on North Korea, with help from China, but has said he's open to meeting Kim.