Portside aims to provide varied material of interest to people on the left that will help them to interpret the world, and to change it.
Well, there's nary a lawyer, much less a constitutional scholar, among the ps moderators. But from a common sense point of view, reproduction of politically relevant material which has been placed on the internet would seem to enjoy lots of First Amendment protection. These issues may ultimately be decided by the Supreme Court, though there doesn't seem to be any too much constitutional scholarship there, either.