If one judges Joe Biden's convention speech by the standards of past convention speeches, whether Democrat or Republican, it was decidedly mediocre.  He had a lot of platitudes, he spouted lies, and he plagiarized.  In other words, it was what we've come to expect from Joe Biden during his 47 years in politics. For Biden's supporters, though, which means those who hate Trump, it was a satisfying performance.  Unfortunately, Joe may not have enough of those supporters to make a difference come November.  This Democrat convention may have been the first time in American political history that a candidate's speech, rather than giving him the...