Republicans took control of Congress in the 1946 elections after the strike wave of 1945–46, and Truman suffered another defeat by the conservative coalition when the 80th Congress passed the Taft–Hartley Act into law over his veto. Congress also passed bills designed to cut taxes, weaken the Interstate Commerce Commission, and reduce the number of employees covered by Social Security, but all were voted by Truman in 1947. Upon returning to session in 1948, Congress passed the Revenue Act of 1948, another major tax cut; Truman again vetoed the bill, but this time his veto was overridden by Congress.In response to the labor unrest of 1945 and 1946, Congress passed the Labor Management Relations Act of 1947, also known as the Taft–Hartley Act, which amended the National Labor Relations Act of 1935.