(Springfield, IL) -- U.S. Senator Dick Durbin's Republican challenger has gained a huge endorsement. The National Federation of Independent Business has cast its support behind Jim Oberweis. NFIB official Lisa Goeas says she chose the career candidate because of his strong pro-business position. State Senator Oberweis has a 100 percent NFIB voting record. Incumbent Durbin has a 25 percent lifetime voting record with the business group.