what branch of government can veto bills
Only the President, head of the Executive branch, has the power to veto legislation. The Supreme Court (Judicial branch) can use judicial review to declare challenged legislation unconstitutional, nullifying a law, but is not the same as a veto. Congress had the power of Legislative Veto until the Supreme Court declared the practice unconstitutional in INS v. Chadha, (1983). Congress and the President still cooperate to use an informal variation of this rule. Only the President, head of the <b>Executive branch</b>, has the power to veto legislation.   The Supreme Court (Judicial branch) can use judicial review to declare challenged legislation unconstitutional, nullifying a law, but is not the same as a veto.