Richard Mourdock says he's "reasonably optimistic" he'll defeat six-term incumbent Sen. Richard Lugar in Indiana's Republican primary.
The tea party-backed challenger told the Evansville Courier & Press he expected to win the party's Senate nomination after he cast his ballot at a vote center in Evansville early Tuesday morning. The former Vanderburgh County commissioner and current state treasurer lives in Darmstadt.
Recent polling has shown Lugar trailing Mourdock.
Mourdock attributes some of his support to "self-inflicted wounds" by the Lugar campaign, which he says was largely run by Washington, D.C., insiders.
Whoever wins the primary will face Democratic U.S. Rep. Joe Donnelly in November.
Mourdock says if he wins the nomination one of his top priorities will be to unite Republicans.