President Obama sought to assuage organized labor's misgivings about the healthcare overhaul, even as several key union leaders warned that the bill's final outlines could severely dampen their enthusiasm for the Democratic ticket in this year's elections, the Washington Post reports. Obama invited 10 labor leaders to the White House to discuss the negotiations aimed at reconciling the Senate and House bills, which are not heading in organized labor's direction in the three areas that it had identified as priorities, the Post reports.