For the last six years, the one thing that has kept the Democratic Party unified and motivated is Donald Trump. Fear and loathing got Democrats to turn out in the 2018 midterms, and kept those voters engaged in 2020. Sure, the party was divided ideologically and generationally, with liberals and younger voters flocking to the Bernie Sanders wing and older, Black and more moderate Democrats sticking with Joe Biden. But, at the end of the day, both sides understood that the most important and existential issue was defeating Trump.