The system of checks and balances failed under Andrew Jackson when he
A. passed the Wagner Act.
B. declared war without a declaration of war from Congress.
C. acted against a ruling of the Supreme Court.
D. failed to repeal the Patriot Act.
The system of checks and balances failed under Andrew Jackson when he "C. acted against a ruling of the Supreme Court," since the court is meant to act with Judicial Review, as well as place "checks" on the power of the Executive Branch.