What Democrats need to do is figure out what went wrong, and fix it.
I'll tell you what went wrong. A combination of the Kennedy assassination, the Martin Luther King, Jr. assassination, the Vietnam War, and Watergate caused the Democratic Party to take a wild lurch to the left, and they have now lost all their moderates and conservatives, who used to round out their message when they were a majority party.
All Democrats have left now are the coasts, a few big cities, with its concentration of privileged elite white liberals, and minorities dependent on the welfare state. Almost everyone else is voting Republlcan now.