 Both the President of the United States and U.S. state governors usually issue a veto statement or veto message that provides their reasons for vetoing a measure when returning it to Congress or the state legislature, as required by the U.S. Constitution, state constitutions, or by custom.Those statements do not have precedential value, although their reasoning may be respected within the Executive Branch, and can contribute to the American constitutional tradition.However, unlike a presidential signing statement, a veto statement does not carry much direct weight in the American legal system, because of its function