(CNN) - Pennsylvania may be in for a nail-biter in November, according to the results of a new poll released Thursday.
Republican nominee Pat Toomey is leading Rep. Joe Sestak, the Democrat's nominee, 45 percent to 42 percent among likely voters in the Keystone State's race for Senate, according to a Susquehanna Polling and Research survey conducted for the Pittsburgh Tribune-Review. Toomey's three-point lead falls within the margin of error.
The poll portrays a tighter race than a spate of other recent polls have indicated. Toomey held a five-point advantage in a CNN/Time/Opinion Research Corporation poll released last week, a seven-point margin in recent surveys from Quinnipiac University and Muhlenberg College, and a nine point lead in a recent Franklin and Marshall College poll.
Sestak, a two term congressman and former Navy admiral, leads Toomey, a former congressman, among independent voters by a 41 to 30 percent margin, according to Susquehanna's survey.
The news does not appears to be as good for President Obama, who fundraised for Sestak earlier this month. Only 41 percent of Pennsylvanians approve of the job he's doing, while 49 percent said they disapprove of his work.
The survey of 800 likely Pennsylvania voters was conducted by telephone from Sept. 23-26, and has a sampling error of plus/minus 3.5 percentage points.