With just days before the Pennsylvania Primary on Tuesday, the race for the Republican Gubernatorial nomination will drop by one to seven today. An official familiar with both campaigns says that Jake Corman will endorse Lou Barletta later this morning. According to the latest polling numbers, Doug Mastriano is the front-runner followed by Lou Barletta, Dave White, Bill McSwain, Melissa Hart, Joe Gale, and Charlie Gerow.