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.