Obamacare premiums are set to spike for tens of millions of Americans next month. Plenty of rank-and-file Republicans are happy to sit back and ride it out.

Some vulnerable GOP lawmakers up for reelection are scrambling for a last-minute fix to renew the enhanced federal health care subsidies keeping costs down. But even if party leaders and Donald Trump were to rally around a plan in the coming days — and there’s no sign of that happening — many conservatives are likely to revolt.

Democrats have vowed to hammer the GOP in the midterms if they allow the federal aid to expire, but many on the right expect the political fallout to be minimal, or even to backfire on Democrats. For other conservatives, any blowback will be worth it if it means they get to rein in a system the party has fundamentally opposed since its launch more than a decade ago.