One needs to look at a moving average of poles before drawing conclusions.
http://www.csmonitor.com/USA/DC-Decoder/Decoder-Wire/2012/0620/Obama-leads-Romney-by-13-points-in-new-poll.-Can-that-be-right?cmpid=ema:nws:Daily%20Custom%202%20(06202012)&cmpid=ema:nws:NzQ4MDU4NDEwMgS2