Rutherford B. Hayes

Nominated in 1876 as a compromise candidate by the Republican party; running against Democrat candidate Samuel Tilden (put Tweed Ring in jail); three southern states (Louisiana, South Carolina, and Florida) submitted two sets of returns, one Democratic and one Republican; Congress was uncertain who choose which set of returns were used, which was resolved by the Compromise of 1877; the Republican returns were chosen and Hayes became president because he agreed to the concessions for the Democrats in the Compromise of 1877.  This stalemate between Democrats and Republicans was known as the Hayes-Tilden Standoff.