The GOP’s best chance of knocking down the Affordable Care Act disappeared Thursday when the Supreme Court sided with the administration in King v. Burwell. With the case decided, the Senate could start holding the anti-Obamacare votes leadership said they wanted to attempt when they took the chamber this year.

But with a crowded floor schedule, the prospect of tough amendment votes under regular order and disagreement over what budget reconciliation should be used for, it’s unclear how Republicans will go about taking those votes.