The two more prominent political parties which stand for this seem to be: Green Party of the USA https://www.gp.org/ https://www.gp.org/ The People's Party -

The two more prominent political parties which stand for this seem to be: Green Party of the USA https://www.gp.org/ https://www.gp.org/ The People's Party - recently formed, channels a lot of the disappointment of Sanders supporters but also non-two-party elements https://peoplesparty.org/ https://peoplesparty.org/ However, my personal opinion is that it is more important to develop anti-imperialism in the context of organizing independent labor unions, unemployed people's organizations, neighborhood committees, student unions and such. This has many reasons IMO which I won't go into in this thread.