The Quinnipiac University poll released Wednesday showed 49 percent of Republican voters are undecided about whom to support in the May 18 primary. State Attorney General Tom Corbett is favored by 43 percent of voters and state Rep. Sam Rohrer by 5 percent.
Among Democrats, Allegheny County Executive Dan Onorato appears to hold a slim lead with 16 percent. That contrasts with state Auditor General Jack Wagner at 11 percent, former U.S. Rep. Joe Hoeffel at 10 percent and state Sen. Anthony Williams at 2 percent.
The survey of 649 Democrats and 605 Republicans was conducted in the week ending Sunday. The sampling error margin was plus or minus 4 percentage points.
