D.C.’s hysteria is dangerous. The strike wasn’t necessarily wrong, but the president must tread carefully. Too much of D.C. wants him not to. D.C. is all worked up over the killing of Qasem Soleimani, Iran’s top military operator. Democrats, driven by anti-Trump madness, have taken to eulogizing Soleimani. That’s insane. Meanwhile, D.C. Republicans are ecstatic about the killing.Soleimani certainly deserved it. During the heyday of the Shiite uprising in Iraq, his forces were responsible for bombs that killed countless American servicemembers. It’s good that he is dead.Soleimani was hit because Iranian proxies were behind recent attacks in Iraq, including...