With three polls showing her in the lead, Sen. Elizabeth Warren, D-Mass., may soon eclipse former Vice President Joe Biden as the front-runner for the Democratic presidential nomination. That's great news for Republicans, because Warren has a problem: The central message of her campaign is that the economy is working for the very wealthy but it is not working for ordinary Americans. Unfortunately for her, ordinary Americans disagree. A Marist poll asked voters whether "the economy is working well for you personally." Nearly two-thirds of Americans said yes. This includes large majorities in almost every demographic group. Sixty-seven percent of...