Answer:
The Supreme Court and other federal courts (judicial branch) can declare laws or presidential actions unconstitutional, in a process known as judicial review. By passing amendments to the Constitution, Congress can effectively check the decisions of the Supreme Court.
Explanation:
A dispute between President Harry S. Truman and GeneralDouglas MacArthur in 1951, during the Korean War. MacArthur, who commanded the troops of the United Nations, wanted to use American air power to attack the People's Republic of China.