the president
the governor
It can not become the law of the land.
This act will become law, unless the president vetoes it.
They can try to override the veto.
it can start a veto.
one week
The president enforces the law, vetoes laws, and makes treaties.
If the president vetoes a bill, then Congress can override that vetoe, but the bill must go back to Congress to be approved with a majority vote.
Between each step for a bill to become a law, that bill can die. These are considered "vetoes". For example: in a committee the bill can be shot down before it makes it to the subcommittee.
citizens' vetoes
the supreme court justices
If the president vetoes a bill, it means that they reject it and it does not become a law. However, Congress can override the veto with a two-thirds majority vote in both the House of Representatives and the Senate, making the bill a law without the president's approval.