To make a follow-up point on Al Wynn, there are districts where moderation is understandable, where centrism is a currency that actually helps keep you in office. Maryland's 4th, which regularly gives 80 percent of its votes to its Democrat, is not one of them. These are the districts that can sustain serious progressives, and thus help, in the aggregate, pull the Democratic Caucus in progressive directions. To leave a timid corporatist like Wynn in such a seat isn't merely irksome, it's actually a serious opportunity cost, and it does real damage. If every safe Democratic seat were occupied by the sort of principled Democrat it could sustain, you'd have a very different Caucus today.