A few years ago, they wouldn't have. Now they would, and should. The GOP has escalated and the Democrats need to respond in kind by expanding the Supreme Court and the federal judiciary, to undo the damage caused by years of Republican obstruction which prevented Obama from appointing hundreds of judges.

Please stop pretending that this game of escalating stakes and norm-breaking is somehow on the Democrats. We've been watching Mitch McConnell and we remember what he's done.