Voting is underway throughout the Keystone State with lines forming before the polls opened at 7 a.m.
One of the elections being watched very closely is the 17th Congressional where incumbent Democrat Conor Lamb is challenged by Republican Sean Parnell.
Lamb was outside the Potomac Air Lodge in Moon Township Tuesday morning and said "I feel proud, honestly. I feel proud of what we're seeing here which is that in the face of just historic challenges people are coming out and making their voice heard. They're using the system that was built for us."
One thing that both Lamb and Parnell share - vandals struck both with spray paint with the same message painted on Lamb's office wall and Parnell's home garage: "Don't Vote! Fight for revolution!"