WASHINGTON -- As the Democrats grow increasingly ravenous to have a shot at the presidency of Donald Trump, they are beginning to train their guns on the frontrunners for the nomination. That means they are contemplating finishing off Sen. Elizabeth Warren long before 2020. They are taking aim at her claim to being a Native American maiden, though Trump has the best line on her. He calls her "Pocahontas." If she ever gets to debate him, that ought to be the end of our modern-day Sitting Bull. Poof. By then, the president ought to be able to calculate how much...