He’s referring to Sasse, Romney and Rubio, all of whom have criticized Trumps move. McConnell has too, but he’s not running for pres.
Sasse just got 67% of the vote in his race. Romney would have gotten a similar number, too. Little Marco is planning on using Hispanics as his base and MAGA voters are not his prioirty. These guys just do not care about what the GOP base wants. Never have. Never will.