In 1947, Congress passed the 22nd amendment to the U.S. Constitution to set term limits for the office of the President.  The states ratified the amendment in 1951.

FDR (Dem - blue) vs. Thomas Dewey (Rep - red)

The country, already at a boil over the issue of slavery, was torn in two by Lincoln’s win over 3 other candidates.  Seven states had seceded by the time Lincoln took office in March of 1861.

Lincoln (Rep-red), Douglas (North Dem-blue), Breckenridge (South Dem-green), Bell (Union-yellow)

Although McClellan started out strong, his fading performance as a field commander cost him the confidence of the commander in chief.  McClellan would then run against President Lincoln in 1864 election.  He lost…big time.  The History Channel has the story here.

There isn’t much more to say.