Startling epiphany hits Trump biographer live on stage: 'God, how can he do this?'

President Donald Trump's biographer came to a startling conclusion Thursday night — that the president actually believes what he's saying.

And the writer believes that is what will finally bring the Republican Party crashing down in just 10 months from now.

Michael Wolff was speaking to a Daily Beast-hosted live audience in New York City on Wednesday night, and described hearing Trump speak at Davos earlier in the day.

“When America booms, the entire world booms," he told world leaders at the economic forum.