Asked if the decision or an announcement could take place before he leaves for Saudi Arabia on Friday, Trump said: "Even that is possible".
Others under consideration include Michael Luttig, executive vice president of Boeing and a former federal appellate court judge; Michael Garcia, a NY state Court of Appeals associate judge; John Suthers, mayor of Colorado Springs, Colo., Paul Abbate, an FBI executive assistant director; and McCabe, the acting director, the official said.
Trump said in his dismissal letter to Comey that the director had informed him on three separate occasions that he was not under investigation - once at a private dinner and twice in phone conversations, he later told NBC News' Lester Holt.
The White House also changed its narrative about whether the president had chose to fire Mr Comey based on the recommendations by Mr Rosenstein and Attorney General Jeff Sessions.
The firing drew a wave of criticism in large part because the FBI has been investigating whether election meddling by Russian Federation involved people in Trump's presidential campaign, and Trump said in an interview with NBC that the investigation factored into his decision to fire Comey.
Alice Fisher, a high-ranking Justice Department official in former President George W. Bush's administration, was among those scheduled to be interviewed Saturday.
"In fact, when I made a decision to just do it, I said to myself, I said, 'You know, this Russian Federation thing with Trump and Russian Federation is a made-up story; it's an excuse by the Democrats for having lost an election that they should have won", Trump said.
Sidney Crosby, Penguins beat Senators 3-2 to tie series
While defense has been an issue at times Evgeni Malkin knows they to start putting the puck in the net if they hope to move on. Murray saw his first playoff action Wednesday night in Game 3, as Sullivan benched Fleury after Ottawa's hot start.