But he is the only candidate who has won national labor endorsements so far , picking up his 11th union on Tuesday when the United Steelworkers of America endorsed him .
But he is the only candidate who has won national labor endorsements so far , picking up his 11th union on Tuesday when the United Steelworkers of America endorsed him .
But he is the only candidate who has won national labor endorsements so far , picking up his 11th on Tuesday .