Billionaire Republican financier Robert Mercer Thursday is cutting all ties conservative firebrand Milo Yiannopoulos and selling his shares in Breitbart News, which he has funded for years.

Mercer, who has long backed Breitbart and Yiannopoulos, said he hoped Yiannopoulos’ abrasive style and views outside the political mainstream would help people think for themselves. However, as Yiannopoulos moved closer to neo-Nazi and other racist groups, he now regrets supporting him.