I'm pretty sure you're essentially incorrect, in that one of the things <i>Citizens United</i> struck down was the ban on "vote for Smith" by any non-media corporation in the 1-2 months before a Federal election (1 for a primary, 2 for a general).  Wasn't it a specific ban from that provision in McCain-Feingold on their anti-Hillary movie that prompted them to file the lawsuit?<p>I wasn't able to quickly determine if Citizens United itself is a 527, but they are affiliated with one (<a href="http://www.opensecrets.org/527s/527cmtes2.php?ein=&#38;cycle=2008&#38;tname=Citizens+United" rel="nofollow">http://www.opensecrets.org/527s/527cmtes2.php?ein=&#38;cycle...</a>).