President Trump referred to the late actor and director Rob Reiner as having “TRUMP DERANGEMENT SYNDROME” in a social-media post Monday less than a day after authorities said the Democratic activist and donor and his wife were found dead in their Los Angeles home. Trump said Reiner, a critic of the president, was “tortured and struggling” and attributed the death “to the anger he caused others through his massive, unyielding, and incurable affliction with a mind crippling disease known as TRUMP DERANGEMENT SYNDROME.” “He was known to have driven people CRAZY by his raging obsession of President Donald J. Trump,...