This volume explores the conflict between two forces: party polarization and party factionalism. The major change in America’s two political parties over the past half-century has been increased polarization, which has led to a new era of heightened inter-party competition resulting in stronger and more cohesive parties. At the same time, elections, particularly primaries, often reveal deep internal factional divisions within both the parties, and the 2020 election was no different. The De...