Billionaire investor Ken Griffin says if the choice comes down to Marco Rubio versus JD Vance, he's picking Rubio — a notable signal for the next Republican power fight.

• Ken Griffin, worth $30–40 billion, publicly threw his weight behind Rubio over Vance.
• The pitch for Rubio is trust, credibility, and authority — the sense that people instinctively go along with his judgment.
• Big-money backing matters early, since donors like Griffin help shape who becomes the party's front-runner.

Outlook: Expect more billionaire donors to start picking sides as the Rubio-vs-Vance succession race heats up.