In 1852, Virginia delegates considered two men as dark horse nominees who would be satisfactory. One was Franklin Pierce. the other was Henry C. Murphy, former mayor of Brooklyn.
Suppose they'd pushed for Murphy? Does he go through? Probably even faster since he might be more likely to win the New York delegates over. What is his Presidency like? (He's sure to beat teh Whigs, I would think.) I It seems like there's not much difference, but I suppose there could be some.