what would a cruz win in WI and kasich win in PA do to these odds?
Romney and Ryan's shares go up based on speculation of a contested convention.
I don't understand the rationale for thinking Romney or Ryan would manage to get the nomination instead of Cruz in a scenario in which Trump fails to accumulate a delegate majority. Trump and Cruz will amass the vast majority of delegates irrespective of what happens until the convention, and there's no way those delegates would accept nominating anyone other than one of the two leading candidates.
If nominating someone not currently running is a must at a brokered convention, and I honestly doubt that, then it would be someone that Trump and Cruz could generally agree to compromise on. You would more likely get someone like Jeff Sessions than Paul Ryan or Mitt Romney. Trump and Cruz are different flavors of insurgents, but with them as the two dominant forces of the GOP, nominating a generic Beltway man will just infuriate the GOP so harshly that 1968 will seem like a picnic.
