As Rep. Joe Sestak (D-Pa.) says he's likely to enter the race, a new poll shows that a majority of Pennsylvania Democrats want to see Arlen Specter earn the party's nomination in a contested primary.

A Susquehanna Polling and Research survey finds that 63 percent of Democrats believe the Republican-turned-Democrat should face a challenge for the Senate nomination, while 28 percent said he should be the party's nominee. The firm did not test a Specter-Sestak race; other polls have shown Specter with a comfortable edge at this point.

They did test a Specter-Toomey general election:

Senate General Election Matchup
Specter 46%
Toomey 37%
Undecided 13%

The poll was conducted May 26-30, surveying 700 registered voters (the Democratic primary sample was 364 voters). Among “super voters” who have voted in three of the last four general elections, Specter leads by just 3 points, 42-39 percent. Susquehanna reports that Toomey leads in the “T” region, the Lehigh Valley and the Harrisburg area, while Specter leads in the Southwest, Southeast and Allegheny County regions, in addition to his immense 81-10 margin in Philadelphia.

In an early matchup of potential candidates for governor, Attorney General Tom Corbett (R) has a slight lead over Allegheny County Executive Dan Onorato (D), with nearly a third of voters undecided. Neither has officially announced their candidacy, and there will likely be additional candidates from each party.

Governor General Election Matchup
Corbett 34%
Onorato 29%
Undecided 32%