The Democrats are still playing old-school politics and it cost them the election. The Republicans have apparently given over to the oligarchs. A party that actually represents the working class could break the stranglehold that the two-party system has on us.
The US already has a surfeit of third parties: the Libertarian Party, Socialist Party, Green Party and others more obscure. With first-past-the-post voting and the Electoral College, the most any of them can hope for is taking a few votes away from the party whose voters they appeal to most, and helping the others win, thanks to Duverger’s Law. In reality, they’re usually so feeble that they end up as vehicles for cranks or influence operations (i.e. Jill Stein).