After Cruz’s surprisingly strong second-place showings in LA and KY, to go along with wins in Kansas and Maine, is there any prospect that The Party starts pressuring Rubio to drop out? It’s obvious now that Rubio has no shot whatever of getting anywhere close to a plurality of delegates going into the convention, so if he stays in he’s just likely to ensure that Trump ends up with a solid plurality if not an outright majority.
Of course the problem here is that it’s far from clear whether The Party hates Trump more than Cruz, or believes that Cruz would have a better shot in the general. The other is that The Party is just a metaphor for a lot of divergent groups.
So my guess would be no, there’s no real chance of that happening.