This is pretty big: RNC chief Reince Priebus is looking into how much momentum exists to dump Donald Trump at the July convention, reports CNN:

Priebus has spoken with GOP party chairmen in multiple states in recent days in part to get a better sense of how large the anti-Trump faction is among their convention delegations, according to two people familiar with the conversations.

While Priebus has made clear in these conversations that he is not spearheading the latest push for a coup, his involvement sends a signal that the RNC is taking this effort to dump Trump seriously even as other movements have fizzled.

One source said Priebus' ultimate goal is unclear. But some anti-Trump forces are hoping to garner enough support to press the convention's rules committee to alter the rules governing the convention and open a path for a different candidate.