In the United States, if the president is removed for any reason (death, impeachment, resignation), the Presidential Line of Succession would describe who is president next.
But if one of those people does not want the job, can they refuse it?
If the Vice President prefers being the Vice President, can he just pass the job to the Speaker of the House? (And still remain Vice President?)
Could the Speaker pass the job to President Pro Tempore of the Senate?