Final answer:
Rutherford B. Hayes won the 1876 presidential election after winning the electoral vote by a slim margin. The election outcome was disputed and a special electoral commission was established to resolve the issue.
Step-by-step explanation:
Rutherford B. Hayes was declared the winner of the 1876 presidential election after winning the electoral vote by a slim margin of one vote. The election was hotly contested and disputed returns in three states -- Florida, Louisiana, and South Carolina -- threw the outcome into doubt. To resolve the issue, a special electoral commission was established, which ultimately declared Hayes as the winner.