 We have a lot more than eight Democrats who could beat the pants off Mr. Trump. But if we don't limit the town halls to a manageable number of people, we'll get sound bites, not substance. Town halls will give Americans a fresh look at Ms. Harris, introduce them to our deep bench of smart, dynamic, tested leaders. In addition, Democratic delegates will get to further grill and stress test these leaders in public and private meetings before a formal vote of all the delegates at the Democratic Convention. A word about those delegates.