 Abraham Lincoln, Doris Kearns Goodwin and her team of rivals reminds us that going into that Chicago convention in 1860, Lincoln was indeed a dark horse candidate. You didn't have the system of primaries and conventions where so many of these delegates are already pledged, in a way, to a candidate, but there are ways for the party to modify their nominee. My own advice, not being a Democrat, but being both a Republican, then a Progressive, and then again a Republican,