Not that anyone should have been surprised: As always, Sanders was merely doing what he said he would do. In the run-up to the debate, when many thought Sanders might drop out of the race, Sanders admitted he was “losing the debate over electability” yet continued to pressure Biden to address issues of importance to him—such as healthcare, global warming, student debt, immigration, and income inequality.

So Sanders knows his platform is losing—but he wants to force Biden to campaign on it. It’s almost as if he has no allegiance to the Democratic party and does not especially care whether or not the Democratic nominee beats Donald Trump in November.