the 12th amendment was put into effect because
When John Adams was chosen for President in the 1796 election, the second-place candidate, Thomas Jefferson, became Vice President — but Adams was a Federalist and Jefferson was a Democratic-Republican. The two clashed several times during Adams's presidency, though Adams's conflicts with Hamilton, a Federalist, too, probably caused Adams more concern.In the election of 1800, the flaws of the original system became more than apparent. Jefferson and Aaron Burr both got 73 votes in the Electoral College, forcing the House of Representatives to choose. The problem? Both Jefferson and Burr were candidates of the same party, with Burr chosen to be the Vice President; some states preferred Burr, and neither was able to get the required majority until the stalemate was ultimately broken.The result was the 12th Amendment, approved in Congress on December 9, 1803, and ratified on June 15, 1804 (189 days), in time for the new process to be in place for the 1804 election. With the 12th, Electors are directed to vote for a President and for a Vice President rather than for two choices for President.