When Barack Obama couldn't push his economic plans through Congress, he was unfazed: We're not just going to be waiting for legislation in order to make sure that we're providing Americans the kind of help they need. I've got a pen and I've got a phone. Elizabeth Warren likes that idea.  She's therefore announced that, on her first day in the White House, she will take unilateral action to cancel student loan debt: [T]he Department of Education already has broad legal authority to cancel student debt, and we can't afford to wait for Congress to act. So I will start to use...