http://www.reuters.com/article/2014/...A3116V20140402
I find this development bad for USA's democracy and a step towards Oligarchy.
Campaign funding limits meant that politicians should cater to the voters not only for the vote but for funding the campaigns, which gave more power to the voters.
Now, a politician can cater to fewer and wealthier individuals and get most of their funds from them. Lobbies now hold another carrot/stick: "Promise to do that else we will stop sending you the 1 million $/week that we've been giving you for 6 weeks" etc.
While it's not that democracy will collapse overnight because of this, it's IMO a step towards the WRONG direction. Money had too much influence already.