Hillary Clinton was asked about Donald Trump - she just scoffed and shook her head

In an interview that aired Friday, former Secretary of State Hillary Clinton was asked to react to "two words": Donald Trump.

Speaking with the Rev. Al Sharpton, Clinton initially appeared flabbergasted in how she would describe the Republican presidential front-runner.

"Ugh. Agh. You know, Rev. Al, he has been stoking prejudice and paranoia. He's been really appealing to the worst instincts of human nature," Clinton said. "I think it's dangerous. His demagoguery is no longer amusing."

Sharpton interjected to remind Clinton that Trump had recently called her "shrill." (A Clinton campaign aide labeled the term sexist.)

"He's called me a lot of things - now that he's running against me. Before, he called me a great senator and a great secretary of state. That's what a demagogue does, right? They say whatever they need to say to try and stir up the passions of people," she said.

The exchange was part of a pre-taped interview set to air in full on Sharpton's new MSNBC Sunday show, "Politics Nation." A preview of it aired on "Morning Joe" Friday.

Trump subsequently responded to the preview on "Morning Joe." He pointed out that Clinton, the Democratic front-runner, also used to say nice things about him and suggested that the rigors of the campaign trail had changed their relationship.

"She used to call me a genius. I've come a long way down, I guess. She was always very nice and everything. But I guess it's a different world today. And she's got problems. I would always be nice because I was a businessman, a very successful person, and I was nice to everybody," he said.

"I'm a little surprised at her tone, but that's OK," he continued. "She's been surprised at my tone also." 

Watch Clinton discuss Trump with Sharpton below: