I’m not saying that Elizabeth Warren is the dumbest person in public life–there is a lot of competition for that title–but let’s just say she is having the worst week. First she accused Elon Musk of being a tax freeloader, just before he disclosed that he will pay $11 billion in taxes this year, more than any American in history, to Warren’s slush fund the federal government. Next she blamed skyrocketing food prices on “Big Grocery.” Seriously. . . .