Donald Trump slammed President Obama’s apparent lack of understanding of radical Islamic terrorism.

“Look, we’re led by a man that either is not tough, not smart, or he’s got something else in mind,” Trump said in a Fox News interview Monday morning.

“And the something else in mind — you know, people can’t believe it. People cannot, they cannot believe that President Obama’s acting the way he acts and can’t even mention the words ‘radical Islamic terrorist.’ There’s something going on. It’s inconceivable. There’s something going on.”

Trump called for Obama to resign shortly after his press conference.

The presumptive GOP nominee gave a long speech Monday previewing the foreign policy he would put in place should he become president.

Details of his plan include a temporary ban on Muslim immigration from areas in the world where radical Islam runs rampant and where people have attacked the U.S. and its allies.

“I refuse to be politically correct. I want to do the right thing. I want to straighten things out. And I want to make America great again. The days of deadly ignorance will end, and they will end soon if I’m elected,” Trump said confidently.

The U.S. allows more than 100,000 immigrants from the Middle East to emigrate every year.

The Orlando shooter, Omar Mateen, and all his family had emigrated.

“I want every American to succeed, including Muslims, but they have to work with us,” Trump said in a speech.

Trump also railed against Hillary Clinton for having “no clue” about radical Islam, and who “won’t speak honestly about it, but wants to take Americans’ guns away.”

Trump stated he would not seek a ban on assault rifles in light of the Orlando shooting. “People need protection,” he said.