Presumptive Republican nominee Donald Trump doubts President Obama has the ability or desire to confront terrorism by Islamic extremists. The criticism comes two days after 49 people were gunned down at a gay nightclub in downtown Orlando early Sunday morning.

Trump told Fox News host Bill O'Reilly late Monday the commander in chief's response to Sunday's shootings in Orlando and other recent terrorist attacks has been lacking.

"We don't know who's coming in and frankly, our president doesn't know what the hell he's doing," Trump said.

The New York businessman added Obama has not been fighting the Islamic State overseas "as aggressively as he could."

O'Reilly asked Trump what sinister reasons the president would have for not buckling down on the terrorist group. Trump danced around the question and would not offer a specific reason.

"I think nobody knows, Bill. I have absolutely no idea," Trump said. "Why he doesn't fight and why he doesn't fight it with strength and vigor, nobody knows."

Trump attacked Obama earlier Monday for refusing to use the phrase "radical Islamic terrorism" when referring to attackers affiliated with the Islamic State.

The immigration hawk said Monday he is considering planning a trip to Orlando at the urging of supporters.

Obama announced late Monday he will visit Orlando on Thursday

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