Former Florida Governor Jeb Bush says Donald Trump should face a Republican primary challenge in 2020.

Bush, who ran for president in 2016, told CNN the party “ought to be a given a choice.”

“I think someone should run. Just because Republicans ought to be given a choice,” he said. “To have a conversation about what it is to be a conservative I think is important...And our country needs to have competing ideologies that people -- that are dynamic, that focus on the world we’re in and the world we’re moving towards rather than revert back to a nostalgic time.”

But Bush acknowledged it would be difficult for anyone to defeat Trump because “he has a strong, loyal base” and “it’s hard to beat a sitting president.”

The comments were made in excerpts released by CNN of an interview on The Axe Files, set to air in full Saturday.