It's the other election in Pennsylvania next year -- an open-seat contest for governor. There are no clear favorites for either party, and PA2010.com has results of an internal poll from Philadelphia businessman Tom Knox (D) showing that the Democratic race to succeed Gov. Ed Rendell (D) is wide open.

Primary Election Matchup
Onorato 14
Knox 14
Wagner 13
Cunningham 7
Undecided 52

In that field, state Auditor Jack Wagner is the only statewide-elected official. Dan Onorato, the Allegheny County Executive, has a strong base of support in Western Pennsylvania. Don Cunningham is the current Lehigh County Executive.

In a head to head matchup, Onorato leads Knox 22-21 percent, with 57 percent undecided. The poll was conducted by Fairbank, Maslin, Maullin & Associates, surveying 800 registered Democrats. It had a margin of error of +/- 3.5 percent.

Knox, a former executive at UnitedHealthcare and a deputy mayor under Ed Rendell, poured millions into a campaign for Philadelphia mayor in 2007 but saw his lead evaporate as the Democratic primary closed and then-City Councilor Michael Nutter gained momentum. He's reportedly prepared to spend up to $20 million on a gubernatorial bid.