Given the SCOTUS decision in the Citizen's United case we appear to have entered a period of almost continual campaigning. Many of the political ads during the 2012 election were blatantly false. It is one thing to spin something, it is another to simply lie ( sorry the word "untruth" does not exist in my vocabulary ).
Even if the statement(s) are later retracted it still has the same impact as if one attorney presents data that is removed by sustained objection. The fact is the jury heard it and that is what matters.
False political ads have the same effect. It needs to stop.