Congress cannot veto a law. Any law must be written and passed by Congress in the first place. The president can then veto it. Congress can override the veto with a 2/3 majority. After a law is passed, the Supreme Court can strike it down if they declare the law unconstitutional.
this would be an example of checks and balances.
They can try to override the veto.
the congress can veto a law the president passed
VETO
yes
If the law is passed by votes of fewer than 2/3 of Congress, he can simply refuse to sign it into law, that is, veto it.
it can start a veto.
veto
The term for re-passing a bill after a veto is called "overriding" a veto. A bill which is passed by a 2/3 super majority vote in both houses of Congress following a Presidential veto is a law.
No. The president can veto once passed, and congress can then decide whether to override the veto.
The Congress first overrode a presidential veto - that is, passed a bill into law notwithstanding the President's objections - on March 3, 1845.