The ObamaCare rollout has handed Republicans a remarkable gift, and they are now ahead in the polls for which party should run Congress. The main obstacle to GOP political gains in 2014 would be another stupid, futile budget standoff—and Republicans are just the party to try.

This time the insurrection isn't coming from the Heritage Foundation-tea party caucus, but from defense hawks and appropriators who want to break the annual spending caps in current law. This would be another act of political masochism, handing budget...