Democratic senator Bob Casey Jr. of Pennsylvania only leads his Republican opponent, Tom Smith, by one point, according to a new poll from Rasmussen. Of the 500 likely voters polled, 46 percent support Casey while 45 percent support Smith. The new Rasmussen poll shows a three-point drop in support for Casey from the firm's last poll of the race earlier this month, which showed Casey with 49 percent support and Smith with 45 percent.
Casey, a first-term senator, was considered a near shoo-in for reelection, given Pennsylvania's Democratic advantage and a relatively unknown GOP opponent. But the incumbent Democrat has struggled to poll over 50 percent, and several firms have found Casey leading Smith by only single digits, including a Quinnipiac poll with Smith trailing Casey by three points.