Republican politicians routinely claim that cities run by Democrats have been experiencing crime waves caused by failed governance, but a new study shows murder rates are actually higher in states and cities controlled by Republicans. “We’re seeing murders in our cities, all Democrat-run,” former President Donald Trump asserted at a March 26 rally in Georgia. “People are afraid to go out.” In February, Sen. Tom Cotton, R-Ark., blamed Democrats for a 2018 law that reduced some federal prison sentences — even though it was signed by Trump after passing a GOP-controlled Congress. “It’s your party who voted in lockstep for...