High Quality Content by WIKIPEDIA articles! The 1868 Democratic National Convention was held at Tammany Hall in New York City. Although former Governor from New York Horatio Seymour was nominated as the unanimous candidate for President, he stood virtually no chance of defeating the hero of the Civil War, Republican candidate Ulysses S. Grant. The Democratic Convention chose another Civil War general and former US Representative from Missouri, Francis P. Blair, Jr., as its unanimous candidate for Vice-President.