According to the latest reports, Ken Griffin — a prominent Republican donor who spent upwards of $100 million on the last election — has decided who to back in the 2028 presidential race.Ken Griffiin is famously anti-MAGA, and this latest news represents a growing tide of Republicans who are backing Marco Rubio rather than Vance, the latter of whom was once considered the heir apparent to President Donald Trump but whose star has fallen in recen…