When it comes to health care, Republicans should be careful what they wish for.

Their upcoming vote to repeal the health-care law will be largely symbolic — they don’t have the votes to override President Obama’s certain veto. The real thing happens later, when they try to strip the Department of Health and Human Services of money needed to implement the law’s requirement that all Americans buy health insurance. This could easily precipitate a showdown with the White House—and a government shutdown later this year.