After remaining largely above the fray during the yearlong health-care debate, President Obama anted up all his political capital and took control of the issue last month with a bipartisan health summit and a series of campaign-style speeches. His efforts lent crucial new momentum to House and Senate leaders’ efforts to revive the bill and helped unify the Democratic base behind reform, boosting the legislation’s poll numbers as well. If the House passes health-care reform this Sunday, Obama’s place in history as the most significant Democratic president since Lyndon Johnson seems assured.