12th amendment definition
The Twelfth Amendment refined the process whereby a President and a Vice President are elected by the Electoral College.The amendment was proposed by the Congress on December 9, 1803, and was ratified by the requisite threeâfourths of state legislatures on June 15, 1804.ut no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States. The Twelfth Amendment (Amendment XII) to the United States Constitution provides the procedure for electing the President and Vice President.