Answer:
by breaking up different unionized labor strikes and vetoing the Taft-Hartley Act
Step-by-step explanation:
The action that showed that President Truman angered both union leaders and Republicans in Congress during his first term was "by breaking up different unionized labor strikes and vetoing the Taft-Hartley Act."
The Taft-Hartley Act was carried out and vetoed by President Truman in June 1947 to limit and restrain the rights of Labor Unions, on the premise that during this period, many of such unions damaged the economy. The President vetoed the act because the majority of Republicans in Congress opposed the law.