The 12th Amendment in U.S. History

The 12th Amendment to the Constitution of the United States was ratified in 1804. It provided for the election of the president and vice president by the electoral college and not directly by popular vote. The 12th Amendment also states that if no candidate obtains a majority of the electoral college votes, the House of Representatives (one vote per state) chooses the president and the Senate chooses the vice president. Bet you didn’t know that!

Now the hard part.

          

Who is the only president of the United States to actually be elected by the House of Representatives under the 12th Amendment?