congress votes for president 12th amendment
Summary. The 12th Amendment to the Constitution requires that candidates for President and Vice President receive a majority of electoral votes (currently 270 or more of a total of 538) to be elected.his process is referred to as contingent election. It has occurred only twice since the adoption of the 12th Amendment in 1804: for President in 1825, and for Vice President in 1837. In the House, the President is elected from among the three candidates who received the most electoral votes.