Donald Trump Slams Sen. Elizabeth Warren: She's Hillary Clinton's 'Goofy Friend'

At an Oregon rally, the GOP front-runner calls the senator a "goofus."

During a rally here Friday night at the Lane Events Convention Center, the presumptive Republican presidential nominee took aim at the Democratic senator from Massachusetts, who has been writing tweets critical of him in recent days.

The tweet below, written May 3, is just one of her recent missives:

So at Friday night's rally, Trump bestowed upon her -- like he has with many of his other foes -- a nickname: "Goofy Elizabeth Warren," or his abbreviated variation, "Goofus."

Trump told his supporters, "I just learned that 'Crooked Hillary,' along with her friend -- you know she’s got this goofy friend named Elizabeth Warren, she’s on a Twitter rant. She’s a 'goofus,' she is a 'goofus.'"

It didn't take long for Warren to respond, taking to Twitter, writing, "I called out @realDonaldTrump on Tuesday. 45 million saw it. He's so confident about his 'counter punch' he waited until Friday night. Lame."

She also tweeted, "'Goofy,' @realDonaldTrump? For a guy with "the best words" that’s a pretty lame nickname. Weak!"

He also took issue with Warren's past claims that she's part Native American. “You know, her whole career is a fraud because she goes out and she says she’s a Native American," he said. "I won’t use the word Indian, because they say it’s not a nice word to use."

And as is the case with many past Trump events, there were also protesters (video, below), but there were no disturbances.