how did the twelfth amendment change the electoral college?
Electoral College under the Twelfth Amendment [edit]. While the Twelfth Amendment did not change the composition of the Electoral College or the duties of the electors, it did change the process whereby a President and a Vice President are elected. The new electoral process was first used for the 1804 election.f no candidate for Vice President has a majority of the total votes, the Senate, with each Senator having one vote, chooses the Vice President. The Twelfth Amendment requires the Senate to choose between the candidates with the two highest numbers of electoral votes.