By Matt Bush
In Maryland, the latest poll shows governor Martin O'Malley leading in his quest for re-election.
O'Malley leads his likely general election opponent, former Republican governor Bob Ehrlich, 47 to 41 percent among likely voters in a poll done by OpinionWorks and Center Maryland.
The poll's margin of error is 4 percent.
Among those who say they're certain to vote in November's election however, O'Malley's lead is smaller, at just one point.
The governor's approval rating in the poll is 49 percent.
This latest survey is another example of how close the election is expected to be. Last week, a Rasmussen Reports poll showed O'Malley leading Ehrlich by one percent. Four years ago, the two men faced each other, with O'Malley winning by nearly 7 percent.