While historians have often noted the changes in the power of the presidency, other important aspects of the office have changed as well. These include how the President is selected, when the President takes office, how many terms the President may serve, and how the office of the President is to be filled when vacant.
George Washington does not run for a third term, setting a precedent of a two-term limit for the presidency.
Political parties begin to transform the electoral system by choosing elector candidates. In the 1800 election this evolving system fails. Elector candidate have to cast two different votes for President, but because they are selected by the parties, they also have to vote for their parties' candidates. As a result, the two Democratic-Republican candidates are tied in the election. After 36 ballots, the House of Representatives breaks the tie. Thomas Jefferson becomes President, and Aaron Burr Vice President.
The 12th Amendment, which requires seperate ballots for President and Vice President, is passed to ensure that the election fiasco of 1800 is not repeated.
The 20th Amendment moves the presidential inauguration from March to January.
Franklin Delano Roosevelt (FDR) wins a fourth term. Congress will act in 1947 to limit a president to two terms in office.
Presidential Succession Act defines the officials who would succeed to the presidency after the Vice President.
The 22nd Amendment, which limits a President to two terms, is ratified.
The 25th Amendment sets up procedures to follow when a President is disabled or when the vice presidency is vacant.
The 25th Amendment is invoked again as President Ford nominates Nelson Rockefeller as his successor in the vice presidency.
In Nixon v. Fitzgerald the Supreme Court decides that a President or former President has absolute immunity from liability based on his official acts. This immunity extends to all acts within the "outer perimeter" of his duties of office.
Congress passes legislation that limits secret service protection for former presidents. Under the new legislation, secret service protection is given for up to ten years from the date a president leaves office. Before this legislation, all former presidents, spouses, and their children under age 16 were protected until the president died.
The annual salary for the president is increased for the first time since 1969. In fact, the president's salary is doubled from $200,000 to $400,000.
The disability provision of the 25th Amendment is used for the second time in five years when Vice President Cheney is briefly given presidential authority while President George W. Bush is sedated for another medical procedure.
President Obama signs legislation that reinstates lifetime secret service protection for him and all former presidents, their families, and their children until age 16.