In the United States, the president and vice president are elected by the Electoral College, which is composed of 538 electors. Each state has a number of electors equal to its total number of senators and representatives in Congress. To win the presidency, a candidate must receive a majority of the electoral votes, which is at least 270. The general public votes for these electors in their respective states during the presidential election.
The House of Representatives elects the President, and the Senate elects the Vice President.
The electoral college
The electoral college that elects the president also elects the vice president. In the event that a new vice president is appointed because of a vacancy, both houses of Congress have to confirm the president's appointee.
The Vice President would then be elected by the Senate.
The legislative branch elects the president
The electoral college
The Conscience.
Electoral College (yes I know its same answer as "who elects president?" but it WAS a different question)
The Congress would decide who the Vice-president would be.
In this case, the US Senate elects the vice-president.
The registered voters in all the states and DC elect the president and vice-president albeit in an indirect way.
The Vice President takes over.