Amendment 25 sets rules for temporarily giving the vice-president the powers of the President, both by request of the President and involuntarily . It also gives a process for restoring the president's powers. (The main body of the Constitution makes the vice-president the president if the president dies or resigns.)
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The 25th Amendment
The 25th Amendment
25
The 25th Amendment,section 2 deals with this situation.
The 25th amendment provides for succession in the event a president dies, is unable to fulfill his duties due to a physical or mental disability.
Amendment #25. Specifically, Section 3, which states, "Whenever the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that he is unable to discharge the powers and duties of his office, and until he transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the Vice President as Acting President."
According the Amendment 25, if the President is unable to perform his duties, he must so inform in writing the President pro tempore of the Senate and the Speaker of the House of Representatives.
If the president is unable to perform his duties, there is a procedure for giving his powers temporarily to the vice-president. See amendment 25 to the US constitution.
The 25th Amendment
According to the 25th Amendment of the U.S. Constitution, if the President becomes disabled and is unable to perform the duties of the office, the Vice President assumes the role of Acting President. This transition occurs when the President either voluntarily declares their inability to serve or when the Vice President and a majority of the Cabinet declare the President incapacitated. The President can resume their duties once they inform Congress that they are able to do so.