President Truman sought to support the power of unionized labor when he vetoed Taft-Hartley Act.
C. Taft-Hartley Act.
Explanation:
Harry S. Truman served as the 33rd president of the United States of America. The economy of Western Europe was rebuilt by Truman after the implementation of "Marshall Plan". He also established "Truman Doctrine" and "North Atlantic Treaty Organization (NATO)".
The NATO helps in defending North America and Europe from the possibility of communist Soviet Union taking control of their nation.
Truman cancelled the Taft-Hartley Act which reserved the rights of labor union.