One of the great benefits of winning landslide elections is that you end up building up your own bench of viable candidates while diminishing the other side’s. In this respect, the Republican sweeps of 2010 and 2014 were terrific for the GOP and devastating for the Democrats. Why is Joe Biden president, rather than a younger, Obama-esque star? Why, even now, would it be tough for the Democrats to find a replacement for Biden, even if they wanted to? In part because, in 2010, 2014, and, to a lesser extent, 2016, the Republicans did so well. And they’re wasting it.