
In 1852, by a single vote (4,683 to 4,682), Louisiana's 1st Congressional District voted for Winfield Scott, the Whig Party nominee, over Franklin Pierce, the Democratic Party nominee. Pierce won statewide with 51% of the vote.
Source for the data: https://www.newspapers.com/image/26664261/
The 1st district is Orleans, left bank
The map key is:
Blue: 50–60% voted for Pierce
Yellow: 50–60% voted for Scott