WATCH: Bill O'Reilly says Donald Trump should "stop whining"

The Fox News host encouraged Hillary Clinton, on the other hand, to simply "ignore Donald Trump"

Published October 18, 2016 12:33PM (EDT)

When you've lost Bill O'Reilly, you've lost a substantial part of your conservative base.

Fox News host Bill O'Reilly guested on Stephen Colbert's "Late Show" on Monday. With the third and final presidential debate — moderated by his network colleague Chris Wallace — set for this Wednesday at the University of Nevada in Las Vegas, O'Reilly offered both candidates some pointers.

"If I'm Secretary Clinton, I ignore Donald Trump," O'Reilly suggested of the Democratic nominee. "If I'm Secretary Clinton, I'm trying to look right into the camera and say, 'Look, I'm not as bad as they're portraying me to be. I'm not this dragon-lady. I really want to help you and here's how I wanna help you.'"

"If she spends time on Trump," he added, "it just becomes vaudeville."

O'Reilly's message for the Republican presidential nominee, meanwhile: "Stop whining."

"Both candidates have an opportunity to win voters over if they can convince them that they want to help them," O'Reilly added, gesturing to the audience. "Stop with the other stuff . . . Look, we know it already. People know it."

O'Reilly's advice came as the Republican nominee was in Green Bay, Wisconsin, where he told an audience that voter fraud was "very, very common." He's also complained that the media was out to get him, as his numbers in a key state — North Carolina — are spiraling, with just weeks to go until Election Day on Nov. 8.

By Brendan Gauthier

Brendan Gauthier is a freelance writer.

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Bill O'reilly Donald Trump Elections 2016 Hillary Clinton Late Show Presidential Debate Stephen Colbert