You MUST read this:
http://www.alternet.org/story/149861/top_4_victories_handed_to_corporate_america_by_the_supreme_court_--_so_far?akid=6548.153143.NaV9Xp&rd=1&t=2
A simple and enjoyable description of the CITIZEN'S UNITED case:http://www.youtube.com/watch?v=k5kHACjrdEY&feature=player_embedded