President Trump discussed possible changes among his top staff, the killing of Saudi journalist Jamal Khashoggi, and more in a Fox News Sunday interview with Chris Wallace set to air at 2 p.m. and 7 p.m. Eastern.

"I have three or four or five positions that I'm thinking about [changing]," Trump said of his Cabinet lineup. "Of that, maybe it's going to end up being two. But I need flexibility." He suggested dissatisfaction with Homeland Security Secretary Kirstjen Nielsen in particular.

President Trump on DHS Secretary Kirstjen Nielsen “Well, I like her a lot. I respect her a lot. She’s very smart. I want her to get much tougher and we’ll see what happens there. But I want to be extremely tough.“ #POTUSonFNS pic.twitter.com/vLRLgqiWEh — FoxNewsSunday (@FoxNewsSunday) November 18, 2018

On Khashoggi's death, Trump maintained his skepticism despite Friday's report that the CIA has concluded Saudi Crown Prince Mohammed bin Salman (MBS) ordered the murder. Even if MBS lied to his face, Trump said, "I want to stick with an ally that in many ways has been very good." After all, Trump mused, "Who could really know [whether MBS lied]? But I can say this, he's got many people now that say he had no knowledge."

President Trump answers the question "Did MBS lie to you?"

Watch the full interview on Fox News Channel at 2P/7P. #POTUSonFNS pic.twitter.com/nNI0HAhTRa — FoxNewsSunday (@FoxNewsSunday) November 18, 2018

And asked by Wallace to grade his own presidency, Trump gave himself an A+ and inquired if a better mark is possible. "Look, I hate to do it, but I will do it," he said. "I would give myself an A+. Is that enough? Can I go higher than that?" Watch that clip below. Bonnie Kristian