Congressman Todd Young is the third Republican to enter the race for Sen. Dan Coats' seat.
Senator Joe Donnelly has put his support behind a bill aimed at streamlining the permit process for energy and transportation projects.
Norquist, Founder of Americans For Tax Reform, praises Mourdock for signing a document known as the “Taxpayer Protection Pledge”
The bill would end six-day mail delivery, close post offices and begin to phase out door-to-door delivery entirely.
One candidate has withdrawn leaving seven on the primary ballot.