This helps Ryan so don’t delude yourself. Taking out Ryan and McShiiteStain are also priorities. There is more then just a Presidential election going on here. PLAY THE WHOLE FIELD. This not time to play Rovian cutsie politics.
In an ideal world Trump could stage a big rally in Ryan’s district and actively campaign against him. In this world, Priebus was having a nervous breakdown over Trump’s refusal to endorse. The Pence compromise calms Priebus down while keeping Trump’s non-endorsement intact.
Sometimes you can’t have it all. This is a good compromise.