One of the pivotal moments in the never-ending battle over Obamacare came in August 2009, when members of Congress returned home to their districts and confronted waves of angry constituents at town hall meetings. Much of this anger was fomented by conservative groups, but it succeeded in souring—or further souring—many lawmakers on the president's health-care initiative. Flash forward five years. Obamacare has passed Congress, survived the Supreme Court, and been ratified by voters, who reelected Obama last November. But conservatives are planning one great, final push to try to kill it. And, as before, a key part of that strategy will be confronting lawmakers at August town hall meetings.