Conservatives have rightly decried President Obama’s unconstitutional executive action on Obamacare—and his promises to do the same with immigration. With both branches of Congress now under Republican control, we should act to halt those power grabs, too.

But conservatives can’t simply be angry at the president’s lawlessness when they disagree with his policies. They should end their conspicuous silence about the president’s usurpation of Congress’ sole authority to declare war—even if (especially if) they support going after ISIS, as I do.

This is important. We can’t be for the rule of law at our own convenience. It matters how we act both when we agree and when we disagree with the president.

Conservatives who blast the president for ignoring the separation of powers on immigration display a fatal inconsistency by embracing unlimited war-making powers.