More than a few past presidents were known for bearing grudges — Dwight D. Eisenhower, Lyndon Johnson, and, especially, Richard Nixon were known for having tempers and not being shy about their feelings toward political opponents. But all of these men, even Nixon, stoutly, steadfastly, defended America and Americans. All of them knew the Constitution. All of them, even Nixon, until his role in the Watergate coverup became known, were respected by both our allies and enemies. And had Nixon not been consumed by distrust and an urge to punish his enemies, he would have been remembered as an effective president. The same cannot be said of Donald Trump.