Donald Trump, the billionaire businessman who's leading the Republican polls for president, may have moved on from his very public spat with Fox News star Megyn Kelly, but he's not gone very far. He's simply moved down the hallway to accuse media bigwig Bill O'Reilly of "negative" treatment, too.

Trump wrote in a tweet: "@oreillyfactor was very negative to me in refusing to post the great polls that came out today including NBC. @FoxNews not good for me!"

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The criticism comes on the heels of Trump's open Twitter jabs at Kelly for the perceived attacks she launched on him about his past treatment of women during the Fox News presidential debate, as reported by WND.

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That matter has cooled, but now Trump's finding offense with Kelly's fellow Fox star, O'Reilly.

"@oreillyfactor why don't you have some knowledgeable talking heads on your show for a change instead of the same old Trump haters," Trump also tweeted, the Blaze found. "Boring!"

And another, against the entire cable network: "I am having a really hard time watching @FoxNews."

And another, even blunter, called out O'Reilly's guests as more than simple "Trump haters" – they're "spoon fed morons," he wrote.

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And one more: "@oreillyfactor @FoxNews this is bull fox. O'Reilly, I expect better from you. What is going on? Fair and balanced my ass."

Trump's tweets slamming Fox News and people who criticize him are "just an extension" of his reality show, Fox News' Bill O'Reilly responded Tuesday.

“He wants people to like him. When people criticize him, he takes it personally. And then, you know, this machine, this tweeting thing, that’s like the worst thing you could give Donald Trump is this tweeting thing," O'Reilly told NBC's Matt Lauer on "Today." "So I just think this is just a extension of his reality show, ‘The Apprentice.’ This is just theater right now. … The personal stuff is a piffle."

Asked whether he thought Trump would still be the front-runner months from now, O'Reilly said Trump would still be "competitive" months from now but stopped short of saying he would be the front-runner "with any certainty."

"I think Trump has been good for politics in America, and I’m the only one that says that. Everybody else is bashing the hell out of Donald Trump. That’s the cheap thing to do. But he has engaged people, he has forced them to pay attention and they are paying attention, and that is good for America," O'Reilly added.

Trump is still leading in the polls, but his numbers aren't as star-powered as they've been in recent weeks. The most recent surveys show Carly Fiorina and Ben Carson coming on strong.