Worker's Party USA, A Party, or Just a Group?

I hesitated to post anything about this political party, primarily because I don't see a party platform, nor any candidates for office. The Workers' Party - USA , based out of Chicago seems more to be a vehicle for one man's expression of Marxist-Leninist views. That man, Michael Thorburn, died in June of 2007.

While the site is certainly advocating action against a set of policies with which it disagrees, and actually does so quite eloquently (if a bit within a stereotypical communist formula), perhaps this site gives rise to the question of what a political party is. Need one have candidates, and/or a party platform?

Decide for yourself. Here's the link to this party's site: http://www.workersparty.org/