(CNSNews.com) - "Why do you think President Obama is not fighting ISIS as aggressively as, perhaps, he could?" Fox News's Bill O'Reilly asked Donald Trump on Monday night, around 12 hours after Trump suggested on "Fox & Friends" that Obama may have "something else in mind" that explains his refusal to condemn "radical Islamic terrorism," by name.
"I think nobody knows, Bill," Trump told O'Reilly. "I have absolutely no idea. All I know is that he should be. Why he doesn't fight it and why he doesn't fight it with strength and with vigor, nobody knows. That's certainly a topic of conversation for plenty of people. But he is not doing a good job. That is for sure."
O'Reilly followed up: "But you said this morning on 'Fox & Friends,' or you implied there may be a sinister reason for him not engaging ISIS more aggressively. Do you want to define that further?"
"I can't define it," Trump said. "I mean, nobody knows what's going on. Nobody knows why he doesn't have more anger -- why he doesn't have more competitive zeal. He is a competitive person. Why doesn't he have more competitive zeal to knock them out, Bill? I mean, look at what's going on. Look at what's happening. This Orlando attack was just absolutely horrendous and yet, he still doesn't even use the word of radical Islamic terror. He won't use the words."
Appearing on "Fox & Friends" Monday morning, Trump said the nation is "led by a man that either is not tough, not smart, or he's got something else in mind. And the something else in mind, you know, people can't believe it. People cannot, they cannot believe that President Obama is acting the way he acts and can’t even mention the words ‘radical Islamic terrorism.’ There’s something going on. It’s inconceivable. There’s something going on.”
A short time later, Trump said Obama "doesn’t get it -- or he gets it better than anybody understands. It's one or the other, and either one is unacceptable.”
He said something similar on NBC's "Today" show: "Well, there are a lot of people that think maybe he doesn't want to get it," Trump said while discussing the terror attack in Orlando. "A lot of people think maybe he doesn't want to know about it. I happen to think that he just doesn't know what he's doing. But there are many people that think maybe he doesn't want to get it. He doesn't want to see what's really happening."
Later on O'Reilly's show, Trump said the Orlando nightclub attack "is so disgraceful and so shocking on so many levels, and we just can't have a country like this anymore, Bill. And we have to have a -- we need a president that's going to show passion to solve the problem. He sits there, he talks, it's almost like he is falling -- Bill, it's almost like he is falling asleep."
Trump also told O'Reilly the Afghan-born father of Omar Mateen "shouldn't have been allowed in the country years ago when he came here, alright? He was trouble then and he is obviously -- something is going on right now."
Trump said it may take years for immigrants -- and their children -- to develop grudges against the United States:
"What's going to happen in two years and five years? What's going to happen in 15 and 20 years?" he asked. "A lot of times the children, there seems to be no very good assimilation. A lot of times the children of people that come into the country become a big problem.
"I mean, you, again, look at the Boston bombers, I mean these two horrible beasts, they came in, I mean, the parents were here and they brought these kids in and they became radicalized, I think later on, I think when they were in the country.
"So, you know, bad things are happening, Bill. And we have a president who looks like he is falling asleep when he talks about the subject."
On Monday afternoon, the Washington Post posted a story with the headline, "Donald Trump seems to connect President Obama to Orlando shooting."
The report quoted Trump's remarks on "Fox & Friends."
In response, the Trump campaign revoked the Washington Post's press credentials, based on its "incredibly inaccurate coverage and reporting."
A spokeswoman for the newspaper said in an email that the headline was changed shortly after the story was posted "to more properly reflect what Trump said." She said the headline change was done "on our own," without input from the Trump campaign.