A formal declaration of war.
Confirming the President's major appointments
An executive order
People say that the Vice President is "only a heartbeat away" from the presidency because the vice president is first in the order of succession. If the President's heart should stop beating, the Vice President takes over the office.
If the president dies or otherwise become incapacitated, the vice-president becomes president.
Income Tax
If no candidate receives a majority of electoral votes, the Twelfth Amendment of the United States Constitution provides that the U.S. House of Representatives will select the president, with each of the fifty state delegations casting one vote, and the U.S. Senate will select the vice-president.
It goes to Committee.