The all-base, all-the-time approach got him more votes with Republicans, as I mentioned, but it also motivated more independents and certainly more Democrats to turn out and vote against him.
Biden and Obama are the only two presidents since George H.W. Bush's 1988 victory over Michael Dukakis to earn more than 51 percent of the popular vote. Biden's win was also bigger than Carter's win over Ford. So relatively speaking, Biden's win was decisive. Was it on par with LBJ over Goldwater, Nixon over McGovern or Reagan over Carter/Mondale? No. But for the era we live in now, it was at least a clear win if not decisive one.