Rep. Gabrielle Giffords’ (D-Ariz.) path to re-election just got a lot tougher with state Sen. Jonathan Paton’s (R) entry into the race Sunday.

Paton, who is in his first term in the Senate after serving two terms in the state House, told the Arizona Daily Star, “I see what’s happening across the country and in my own home town, and it’s wrong. It’s as simple as that.”

A U.S. Army captain, he joins three other little-known GOP candidates with military backgrounds in the race — Iraq vets Jesse Kelly, Andy Goss and Brian Miller, who served with the Marines, the Army and the Air Force, respectively.