A superb idea. As Chait says. primary campaigns against senators in red and violet could backfire, although in the context of the kind of opportunity for progressive lawmaking that happens once every three or four decades, I’m willing to take the risk. But having a wet like Feinstein in a solid blue state is completely unacceptable. If a primary campaign scares her into decent policies, we win. If the primary campaign defeats her, we win even more.