Union leaders and labor rights advocates applauded the Democrat-controlled U.S. House for passing landmark legislation Thursday night that supporters have called one of the most notable efforts to expand workers' rights in several decades. "Make no mistake, this is the most significant step Congress has taken to strengthen labor laws in the United States in 85 years and a win for workers everywhere," said AFL-CIO president Richard Trumka, declaring the measure "the labor movement's number one legislative priority this year."