Answer:
Initially, the Republicans were hardly unified around a single candidate themselves. Several leading Republican men vied for their party’s nomination. A consensus emerged at the May 1860 convention that the party’s nominee would need to carry all the free states—for only in that situation could a Republican nominee potentially win. New York Senator William Seward, a leading contender, was passed over. Seward’s pro-immigrant position posed a potential obstacle, particularly in Pennsylvania and New Jersey. Abraham Lincoln of Illinois, as a relatively unknown but likable politician, rose from a pool of potential candidates and was selected by the delegates on the third ballot. The electoral landscape was further complicated through the emergence of a fourth candidate, Tennessee’s John Bell, heading the Constitutional Union Party. The Constitutional Unionists, composed of former Whigs who teamed up with some southern Democrats, made it their mission to avoid the specter of secession while doing little else to address the issues tearing the country apart.
Step-by-step explanation: