Republican megadonor Peter Thiel is signaling to allies that he is largely done helping Ohio Senate candidate J.D. Vance, and wants his deep-pocketed political network to boost Arizona Senate candidate Blake Masters as he trails Democratic Sen. Mark Kelly in the polls, according to people familiar with the matter.

Thiel told guests at a recent Masters fundraising event that he believes Vance is on track to win his Senate race against Rep. Tim Ryan, D-Ohio, according to those who attended the gathering and overheard his comments. The GOP donor hosted the fundraiser at his $5 million home in Los Angeles.

“Peter said, ‘That race [Ohio Senate] is done in my mind,’” according to one of the people familiar with Thiel’s conversations with attendees. Vance and Ryan are vying for retiring Republican Sen. Rob Portman’s seat in Ohio, a swing state where Republicans have enjoyed increased success in recent years.