The White House has overcome last major obstacle blocking enactment of healthcare legislation, cutting a deal with organized labor on how to tax high-cost insurance policies, the Washington Post reports. The agreement would exempt union members from a proposed surtax on expensive insurance plans until 2018, five years after the legislation would take effect. The tax is a key source of financing for Democrats' plan to extend coverage to as many as 36 million additional Americans over the next decade, reports the Post.