Democratic socialists are a benefit to socialism generally if they are arguing from a standpoint of material empowering working people, which this guy is. Either they succeed in making their reforms, and people are empowered, or they fail and radicalize people, as we saw happen with Bernie -- who was critical in the political awakenings of a whole generation of people who now rightly view him as too conservative.

Communists seriously should run for elected office, on campaigns of making radical changes that are allowed by existing legal frameworks -- and the US Constitution especially formally allows for really any change. They cannot "fix" America, but they can benefit us nonetheless. Read Marx, he says the same thing.