Donald Trump has failed at everything his entire life and hasn't done anything for the American public, a former Jeb Bush aide said Thursday.

During an appearance on CNN's "New Day," Tim Miller ripped Trump on several fronts.

"Trump hasn't been successful in anything," Miller said. "I don't know if your viewers have heard of the Tour de Trump or Trump Airlines or Trump Mortgages. Probably not because they all were miserable failures.

"The only thing he's done well is 'Celebrity Apprentice.'"

When CNN anchor Alisyn Camerota noted that Trump has "made a lot of money," Miller continued the bashing.

"I guess. He started with a lot of money and then he's lost a lot of money. He's gone bankrupt three times. Trump has never done anything for the public good."

Miller worked as the communication director for Bush's presidential campaign during this election cycle. He said Trump, despite being a billionaire, has not opened his wallet for charity purposes.

"He's a billionaire. He gives no money to charity," Miller said. "All of us give more money to charity than he does. I'm not anywhere near a billionaire."

Miller continued to pour on the insults, finishing his tirade by saying, "He's done nothing except for fail his whole life."

Trump's charity has come under fire over allegations of not being generous enough and purchasing things like paintings of himself. He addressed some of those claims during Wednesday night's presidential debate, saying he has given money to veterans' groups using his foundation's cash.