What term refers to the presidential power to reject legislation?

The term that refers to the presidential power to reject legislation is "veto." This power is granted to the president by the Constitution, allowing them to refuse to sign a bill into law. When a president vetoes a bill, it is returned to Congress, where lawmakers can attempt to override the veto with a two-thirds majority vote in both the House of Representatives and the Senate. This mechanism acts as a check on legislative power, ensuring that the president can prevent legislation that they believe is not in the best interest of the nation.

The other options refer to different concepts: a filibuster is a tactic used in the Senate to delay or block legislative action; nullification is a doctrine that suggests a state can invalidate federal laws it deems unconstitutional, though this principle has been widely discredited; and an amendment is a formal change or addition to the Constitution itself.