>>> "...Obama's improved performance from the first debate resulted in him going
> from a 4-9 favorite to a 2-5 favorite Wednesday. Meanwhile, Romney bumped from a
> 7-4 underdog to 2-1 to win the Nov. 6 election..."
At this moment it's 2/7 , 11/4.
http://sports.williamhill.com/bet/en-gb/betting/e/1451382/Next-Presidential-US-Election.html