Millard Fillmore
Before the government was strictly bi-partisan, Millard Fillmore became president. Fillmore was a member of the Whig party, which ended up dissolving into the then-Republican party. Back then, the Democratic and Republican party's ethics were the opposite they are today.
Free the Slaves
Fillmore came after the Emancipation Proclamation, and he made attacking the continuation of slavery one of his main goals in his presidency. He focused on the preservation of the Union, which bothered some of his more conservative Whig party members. After Fillmore left office, the Whig party disbanded, and his conservative adversaries went on to form the American Party. Fillmore had an IQ of 149.