Many Republicans fear their dreams of midterm election victories that would give them control of the U.S. House and Senate, along with more governorships, will turn into a nightmare of losses. So they’re trying to pick up votes by generating fear of hordes of “illegal aliens” entering the U.S. to commit crimes, take jobs from U.S. workers and become a burden on taxpayers. Stirring up fear of immigrants is an old and ugly political ploy, dating back to the 19th century. Now, three Republican governors — Ron DeSantis of Florida, Greg Abbott of Texas and Doug Ducey of Arizona —...