We’re all used to seeing California throw its weight around, but its new law requiring a presidential candidate to provide five years of tax returns to be eligible to appear on a primary ballot is a new low. Now, however, a federal district court judge has blocked the state from enforcing it, at least temporarily. It’s the right decision. The law is nothing more than a political attack on President Donald Trump, the federal elections process, and the right of free association of citizens and all political parties. California is weighing its options, but if it chooses to appeal, the Ninth...