Thus, approaching the national convention in Baltimore, to be held in June 1852, the major candidates were Fillmore, Webster, and General Scott. Weed and Seward backed Scott. In late May, the Democrats nominated former New Hampshire senator Franklin Pierce, who had been out of federal politics for nearly a decade before 1852 but had a profile that had risen by his military service during the Mexican War. His nomination as a Northerner sympathetic to the southern view on slavery united the Democrats and meant that the Whig candidate would face an uphill battle to gain the presidency.[107]
Fillmore had become unpopular with northern Whigs for signing and enforcing the Fugitive Slave Act but still had considerable support from the South, where he was seen as the only candidate capable of uniting the party. Once the convention passed a party platform endorsing the Compromise as a final settlement of the slavery question, Fillmore was willing to withdraw. He found that many of his supporters could not accept Webster and that his action would nominate Scott. The convention was deadlocked until Saturday, June 19, when a total of 46 ballots had been taken, and the delegates adjourned until Monday. 