The defectors broke with their party to block a Pentagon spending bill from being debated in the House. Their stances reflect deep G.O.P. divisions pushing the government toward a shutdown.
Speaker Kevin McCarthy was working to cobble together the votes to push through the compromise he struck with President Biden, as lawmakers in both parties signaled their displeasure with the plan.
The rebellion has been led by a small but vocal group of ultraconservative Republicans. But there are other, less-known defectors who could help scuttle the G.O.P. leader’s candidacy.