 They're engaging in a historic effort, post-primary season but pre-convention, to oust their party's democratically chosen candidate from their ticket. And if this effort succeeds, it'll set quite a precedent for the Democrats. It'll mean that winning the Democrats' presidential primary comes with an asterisk, which is that the voters' decision doesn't really matter. It's not final. The party elites can remove you at any time if they want to. This is what they're going for. And they're all in at this point.