Heck, Watergate wasn’t even Nixon’s fault, it was Dean who caused the whole thing and lied to the burglars into thinking Nixon ordered it, and there’s evidence that Nixon covered it up simply out of loyalty to his friends and not because he approved of their actions, or for that matter had any prior knowledge to the break-in. So in all reality, other than maybe the coverup, Nixon’s literally blameless, while the Clintons and Obamas actually have been guilty of a LOT of things that make even the worst elements of the reported Watergate seem trivial by comparison.
And I can’t say Nixon’s one of our better presidents (our being “allied” with China was indeed his fault, though I’d pin the blame more on Henry Kissinger than Nixon), but he still didn’t deserve his treatment at Watergate. If anything, Bill Clinton deserved it more, as did Obama (and it says a lot when one of our worst presidents ever, LBJ, had enough dignity and love for country to not bother running for reelection when it seemed like everyone stopped supporting his war, which was more respectable than Clinton and Obama were).