Arizona Republicans are nominating an entire cast of characters who argue not only that Donald Trump won the election in 2020, but also that the state’s results should be decertified—a process for which there is no legal basis. These Trump-endorsed candidates—Kari Lake for governor, Mark Finchem for secretary of state, Abraham Hamadeh for attorney general, Blake Masters for senator—all won their respective primaries this week and are now one election away from political power. “Stop the Steal” candidates are running—and winning—all over the country. But Arizona concentrates a lot of them within a single geographic area—like an ant farm of...