The Pennsylvania Republican Party is bringing in some artillery to blast Rep. Joe Sestak (D-Pa.).

Rep. Darrell Issa (R-Calif.) will give the keynote address at the party's summer meeting Friday in Hershey, Pa.

Issa, the ranking Republican on the House Oversight and Government Reform Committee, has been doggedly calling for investigations into alleged White House jobs offer to Democratic Senate candidates.

The issue has died somewhat in Pennsylvania since the White House released its memo on the subject, but the state's GOP hopes to keep it alive so as to help its Senate nominee, former Rep. Pat Toomey (R-Pa.).

In a preview of his remarks, Issa also mentions Colorado Senate candidate Andrew Romanoff. Romanoff is another Democratic challenger the White House is alleged to have tried to lure out of a primary using the bait of an administration job.

"After pledging to change the business-as-usual culture of Washington during his campaign, the Sestak-Romanoff controversies have lifted a veil on this presidency that has revealed a Chicago-style politicking that is the antithesis of what candidate Obama campaigned on," the Californian said in a statement.

"For all the talk — and that's what it is: talk — of transparency and accountability that this administration likes to engage in, we still have yet to see this president address the American people directly on if he supports what his White House is doing and if not, what will he do about it?"