The Trump & De Niro Feud Rages On!

Donald Trump / Robert De Niro -- Getty Images

Potential presidential candidate Donald Trump has fired back at Robert De Niro after the actor alluded that the real estate mogul-turned-reality star was nothing more than "a car salesman."

The war of words began on Saturday during a discussion with NBC News' Brian Williams at the Tribeca Film Festival when the actor was asked about the recently averted government shutdown.

PLAY IT NOW: Access Extended: Donald Trump On His Possible Run For President: Is He Ready For The Scrutiny?

"I won't mention names, but certain people in the news the last couple weeks, just, what are they doing? It's crazy. They're making statements about people that they don't even back up," the actor said, according to Movieline. "Go get the facts before you start saying things about people."

Williams asked if he was referring to Trump, who has become very vocal about questioning if President Barack Obama was born in the United States.


"Any of those people have shows on my network on Sunday night?" the NBC Nightly News anchor asked.

"It's like a big hustle. It's like being a car salesman. Don't go out there and say things unless you can back them up," De Niro continued. "How dare you? That's awful to do. To just go out and speak and say these terrible things? Unless you just wanna get over and get the job. It's crazy."

On Monday, Trump fired back during a phone interview on "FOX & Friends."

VIEW THE PHOTOS: Hottest Hollywood Dads!

"Well he's not the brightest bulb on the planet," Trump said of De Niro. "I've been watching him over the years and I like his acting, but, you know, in terms of when I watch him doing interviews and various other things, we're not dealing with Albert Einstein."

Copyright 2011 by NBC Universal, Inc. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

VIEW THE PHOTOS: Donald Trump: The Man, The Money… The Hair!