The US supreme court has issued a landmark ruling that will change the way US election campaigns are financed.<br /><br />By a 5 to 4 vote, the court lifted long-standing limits on corporate spending in political campaigns, opening the door for private entities to flood the political marketplace with corporate money.<br /><br />Al Jazeera's John Terrett explains why it is likely to have an immediate effect on the upcoming Congressional elections in November.
