A former Navy admiral and two-term congressman in Delaware County, Sestak rode an anti-incumbent wave and a brilliantly- executed TV strategy to a May primary victory of Arlen Specter. His primary advertising blitz likely leaves him with slightly more name recognition than his GOP opponent, but he starts at a fundraising deficit after spending heavily against Specter. Campaign Site——Government Site

A darling of the party’s conservative wing, Toomey eventually emerged as the GOP’s presumptive nominee after Arlen Specter’s defection to the Democrats, and easily won his party’s May primary. A national political climate seemingly unfavorable to Democrats and an early fundraising advantage have him well positioned for November. Campaign Site

As a longtime state and federal prosecutor throughout Pennsylvania, Corbett easily won the May Republican primary thanks to deep party support, a large fundraising edge and superior name recognition. Having not faced a competitive primary, he starts with a financial edge against Dan Onorato in what is sure to be a competitive race. Campaign Site——Government Site

Considered the front-runner for the Democratic nomination for years, Onorato used a large campaign war chest to quickly separate himself from his primary rivals and easily won the party’s nomination in May. He faces a tough race against Tom Corbett in the fall. Campaign Site——Government Site

Cawley doggedly pursued and won the state GOP’s endorsement. Many candidates still stayed in the race, and despite fierce criticism from some grassroots conservatives, Cawley prevailed in the May primary to win a job as Tom Corbett’s running mate. Campaign Site

The mid-state lawmaker was a late entrant into the field, but drew surprisingly wide support in the May primary to score an upset win over Jonathan Saidel. Campaign Site——Government Site