What they should do is, concede Trump the nomination, but nothing else. The VP candidate should be chosen despite the clearly stated objection of the nominee, the platform should include planks Trump is on record as being opposed to, the convention itself should be run very tightly and minimizong media exposure of the presidential candidate: it should highlight the governors, the Congress, etc. As little party money as possible should be spent on the presidential race and Republicans should go out of their way to minimize their contribution to Trump exposure. E.g., never mention him by name: only "i support the entire Republican ticket", never schedule joint events with him (but do schedule the VP candidate he hates), etc.
I quite like this idea. The convention picks for Veep an anti-Trump who campaigns against him urging defeat of his own ticket, and 2) if in some alternative universe, Trump nevertheless manages to get elected, if he then contravenes the law (quite likely), he then can be promptly impeached, convicted and removed, and the sane Pub Veep guy parachuted in, since obviously more than two thirds of both houses of Congress loathe Trump. It's quite a good insurance policy actually.
Kasich for VP!
