Here's something you don't see every day: a candidate for Congress shifting his campaign from one district to another.

In Pennsylvania, Republican businessman Steven Welch announced Saturday that he was ending his campaign in the 7th District, which Democratic Rep. Joe Sestak is giving up to run for Senate, and continuing his 2010 campaign in the 6th District, which Republican Rep. Jim Gerlach is giving up to run for governor. Both districts take in suburbs of Philadelphia.

Welch, in a statement, said that his decision was motivated by "overwhelming outreach by grass-roots and community leaders," though he is pleasing Republican strategists by deferring to the 7th District candidacy of Republican Pat Meehan, a former federal prosecutor who plans to announce Monday that he is seeking Sestak's seat.

He may not have held an official announcement event yet, Pennsylvania Rep. Joe Sestak has made it so abundantly clear he's challenging Sen. Arlen Specter in a 2010 Democratic primary that would-be successors in Sestak's 7th District are preparing campaigns.

A candidacy announcement came Thursday from Republican businessman Steven Welch, who promises that his run in the 7th District, a suburban Philadelphia constituency, will feature a "new style of campaigning that will focus on voter engagement and utilize cutting-edge technologies."

"I am running for Congress to ensure that we send people to Washington with a proven record of creating good jobs with good benefits, who have balanced the budget and met a bottom line," Welch said in a video statement on his campaign Web site, which includes several videos and links to Facebook and Twitter pages.