The US Congress sets his salary. They are not allowed to change it during his term of office.
The USN
The US Congress sets all federal salaries including the President. (It can not reduce salaries of people already in office .)
what is the name of the president
If the president passes away, resigns, or is impeached.
whenever the president determines that its necessary
Knowledge, skill and abilities.
The Supreme Court determines if bills passed into law by the Congress and the President are constitutional.
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Supreme Court
The 25th amendment to the Constitution did. It was ratified in 1967. It says that if the president is removed the vice president will become the president.
No, congress determines the punishment for treason
The President