Above is a rally at Madison Sq Garden in 1947 to oppose the Labor Managment Regulations Act, which is also known as the Taft Hartley Act.  This bill ended up being passed over the veto of Harry S. Truman on June 23, 1947.  When the bill passed Truman denounced it as “The Slave Labor Bill.”  This was one of the first major revisions of Wagner act since 1935.  This act did such things like fobidding strikes and boycotts and also forbade unions from contributing to political campains.  Also Union leaders had to affrim that they were not supports of the communist party.