Take on Trump-Mitt sandwich

Trump hates Mitt, Mitt thinks Trump is not as nice as he should be. Trump shows up to a gun fight fully armed, Mitt shows up with a thank you card. Trump calls Mitt an ass, Mitt says that we should be kinder to each other.
Mitt has a chance to be the voice of truth to be the one who brings the GOP out of the darkness, somebody who leads the establishment to the light.
But this is the president we have and I'd love to see Mitt show a sack. If not him, then who?!?