Slop.

It is correct to say it's futile to seek state or federal office as a leftist third party. It's simply not in the cards and electing a handful of commies to the house of representatives isn't going to do anything. I truly do believe it's a waste of time and resources.

Any leftist organization in the United States should only seek federal political office as propaganda or disruption, not to realistically gain votes. Local politics though are another game and it's very valid for leftists to run for city council, school board, that kind of thing. That stuff is actually important and within reach. I'd expect any leftist organization with sufficient infrastructure and membership to at least engage with local electoral politics. Like at least go to city council meetings or whatever your city might have. At least try things like that if you have the people and time available.

But also leftist orgs in the US are usually so thin and stretched that they already have their hands full just doing basic day to day admin type things. It's hard out there and there simply aren't a lot of us. There are way, way more of us than 15 years ago but leftism in the US is still more of an ambient subconscious anger than any sort of militant force to be wielded.