Joe Biden: Donald Trump 'Makes Me Sad'

Biden said it's not "wise" to "appeal to the darker side of human nature."

“When I listen to some of the stuff Donald Trump says it just makes me sad,” Biden said in an interview with Billboard.

“It’s never, never been wise to try and appeal to the darker side of human nature," he added. "Abraham Lincoln was right -- it’s about appealing to our better angels. That’s who Americans are and that’s what they want.”

Asked whether it was “disconcerting” for a candidate to promote “aggression among his supporters,” the vice president said it was “the antithesis of everything this country is about.”

Earlier this month, the vice president joked that he wanted to “thank Donald Trump” because his campaign rhetoric is “making the American people look in the mirror.”