IMHO the only questionable organizations are ones like moveon.org, which are sponsored by big donors like Soros.
Wonkette may be an idiot, but as far as I know she's her own idiot, without backing from the DNC or the usual suspects. FreeRepublic is a free association supported by its members.
Under the McCain-Feingold law they could probably close down moveon.org. But frankly McCain-Feingold is unconstitutional. Since SCOTUS is too ideological to admit that, congress should repeal the damnable thing. And get their act together to appoint some decent judges.
One crucial point is that Moveon.org finances TV campaign ads.
Therefore, Moveon.org clearly falls under the jurisdiction of campaign finance laws.
By contrast, no political organization or political advertisement gets a single dollar of support from Free Republic, LLC.
All Free Republic, LLC does is provide a venue for the political opinions of FR registered posters to be posted on the web. In order to read those opinions, the reader must seek them out as they would seek out a newspaper article.
That is 100% Constitutionally protected speech.