KENOSHA, Wis. (AP) — Rob Zerban (zer-BAHN'), the Democrat who lost to U.S. Representative Paul Ryan in last year's election, is mounting a new challenge next year. Zerban told The Associated Press this week he was getting back in the race. He made his announcement official Saturday at a rally in Kenosha. He lost last year by 12 percentage points, 55 percent to 43 percent. But that was Ryan's smallest margin of victory in eight races. The 45-year-old Zerban is a former Kenosha County Board supervisor who used to run two small businesses. He blames Ryan for voting against ending the government shutdown, and for advancing a budget that cuts money from social-service programs. Zerban says he supports green technology, immigration reform and same-sex marriage.