Every state constitution empowers the governor to veto an entire bill passed by the legislature. Many constitutions expand the executive's veto powers by also authorizing methods of veto that permit particular portions of a bill to be rejected or changed.
In United States government, the line-item veto, or partial veto, is the power of an executive authority to nullify or cancel specific provisions of a bill, usually a budget appropriations bill, without vetoing the entire legislative package.
If the President vetoes the bill, it is returned to the congressional chamber in which it originated; that chamber may attempt to override the president's veto, though a successful override vote requires the support of two-thirds of those voting.
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