(CNN) - A new poll suggests that Republicans are in good shape as they try to win back a Senate seat and the governor's office in Pennsylvania.
According to a CNN/Time/Opinion Research Corporation survey released Wednesday, former Rep. Pat Toomey, the GOP Senate nominee, holds a 49 to 44 percent advantage over Rep. Joe Sestak, the Democratic nominee, among likely voters in Pennsylvania, with seven percent either undecided or supporting a different candidate.
Toomey's five point lead is within the poll's sampling error. The poll indicates that Toomey leads by nine points among Independent voters.
"The key to Sestak's low numbers may be his showing in the Philadelphia suburbs," says CNN Polling Director Keating Holland. "That's his home territory, but he's currently pulling only 46 percent in that region compared to 48 percent for Toomey. In addition, among the ten states that CNN has surveyed so far, Sestak is the only Democratic candidate in a two-person Senate race who does not have an edge among women."
While Toomey holds a five point advantage over Sestak among likely voters, among the larger pool of registered voters, the two candidates are deadlocked at 45 percent.
Earlier this year Sestak, a former admiral and two-term congressman from southeast Pennsylvania, defeated Democrat Sen. Arlen Specter for their party's nomination. When Specter switched parties last year, he cited the difficulty in winning the Republican primary against Toomey as a factor. Besides his service in Congress, Toomey is also the former head of the Club for Growth, a limited-government and anti-tax organization, and he enjoys the support of many in the Tea Party movement.
In the battle for governor, the poll indicates that Republican nominee Tom Corbett leads Dan Onorato, the Democrats' nominee, 52 to 44 percent with five percent either undecided or backing another candidate.
According to the survey, Corbett leads by 16 points among independent voters.
Onorato, the chief executive of Allegheny County, and Corbett, the state's attorney general, are battling to succeed term-limited Democratic Gov. Ed Rendell.
"The governor's race is a match-up of two men with roots in western Pennsylvania, and that usually leaves eastern Pennsylvania up for grabs," Holland says. "But outside of Philadelphia, Corbett is leading Onorato by 13 points in the eastern part of the state. Corbett also has a nine-point lead in western Pennsylvania, negating any hometown advantage Onorato might have hoped for."
While Corbett leads by eight points among likely voters, among the larger pool of registered voters his advantage shrinks to five points.
The CNN/Time/Opinion Research Corporation poll was conducted September 17-21, with 1,306 registered voters in Pennsylvania, including 741 likely voters questioned by telephone. The survey's sampling error is plus or minus 2.5 percentage points for registered voters and 3.5 percentage points for likely voters.
– CNN's Deputy Political Director Paul Steinhauser contributed to this report