Transcript for Trump leaves open possibility of firing Sessions

To the fallout between president trump and his attorney general Jeff sessions, the president leaving open the responsibility he will fire him. Our chief white house correspondent Jon Karl is in Washington with all those details. Good morning. Reporter: Good morning. The president has made it clear he is so disappointed with his attorney general, that firing him remains on the table, although this morning, Jeff sessions is showing absolutely no signs of stepping down. After days of unprecedented attacks on his own attorney general, the president dismissed criticism at the rally in Ohio that he's been off message and unpresidential. Sometimes they say he doesn't act presidential. And I say, hey, look, great schools, smart guy, it's so easy to act presidential, but that's not going to get it done. With the exception of the late, great Abraham Lincoln, I can be more presidential than any president that's ever held this office. Reporter: But just hours earlier the president was publicly seething over attorney general Jeff sessions and his decision to recuse himself from the Russia investigation. If he was going to recuse himself, he should have told me prior to taking office, and I would have quite simply picked somebody else. Reporter: The president accused sessions of hurting the institution of the presidency and refused to rule out firing him. We will see what happens. Time will tell. Time will tell. Reporter: The president's attacks have not set well with sessions' former colleagues in congress. I think he made the right decision to recuse himself from the Russia matter. Jeff has been very loyal to the president and I think he deserves it back. Reporter: ABC news has learned that top trump ally newt Gingrich made a personal intervention with the president on Tuesday to try to smooth things over. Gingrich late yesterday said that sessions was one of the president's most loyal supporters, again, reiterating that firing him would be a mistake but warned this story is not yet finished. Also not finished, the Russian investigation. Jared Kushner has now been up on capitol hill twice to talk about that meeting with the Russian lawyer last year but where do things stand with the president's former campaign manager Paul manafort and the president's son, junior, don junior? Reporter: Manafort was quietly on the hill in closed sessions yesterday meeting with the senate intelligence committee. Both men, both he and don junior have agreed to cooperate with congressional investigators. We expect to see don junior on the hill sometime in the coming week, robin. All right, Jon, thank you.

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