sufficient support outside of the party's political base of South Carolina to ever make the Nullifiers more than a fringe party nationwide. Many party members began to drift towards the Democratic Party, but there was no question of the party endorsing Van Buren's bid for the presidency, as he and Calhoun were sworn enemies. Seeing little point in running their own ticket, Calhoun pushed the party into backing the White/Tyler ticket, as White had previously sided against Jackson during the Nullification Crisis. General election Campaign In the aftermath of the Nat Turner slave rebellion and other events, slavery emerged as an increasingly prominent political issue. Calhoun attacked Van Buren, saying that he could not be trusted to protect Southern interests and accusing the sitting Vice President of affiliating with abolitionists. Van Buren defeated Harrison by a margin of 51.4% to 48.6% in the North, and he defeated White by a similar margin of 50.7% to 49.3% in the South. Disputes A dispute similar to that of Indiana in 1817 and Missouri in 1821 arose during the counting of the electoral votes. Michigan only became a state on January 26, 1837, and had cast its electoral votes for president before that date. Anticipating a challenge to the results, Congress resolved on February 4, 1837, that during the counting four days later the final tally was read twice, once with Michigan and once without Michigan. The counting proceeded in accordance with the resolution. The dispute had no bearing on the final result: either way Van Buren was elected, and either way no candidate had a majority for vice-president. Results The Whigs' strategy narrowly failed to prevent Van Buren's election as president, though he earned a somewhat lower share of the popular vote and fewer electoral votes than Andrew Jackson had in either of the previous two elections. The key state in this election was ultimately Pennsylvania, which Van Buren won from Harrison with a narrow majority of just 4,222 votes. Had Harrison won the state, Van Buren would have been left eight votes short of an Electoral College majority - despite receiving a majority (50.48%) in the popular vote - and the Whig goal to force the election into the House of Representatives (in accordance with the Twelfth Amendment to the United States Constitution) would have succeeded. In a contingent election, the House would have been required to choose between Van Buren,