CARSON CITY — An estimated 25,000 Nevadans will lose their unemployment benefits on Jan. 2 if Congress fails to reach a deal on the federal budget, state officials said. The state Division of Employment Security said today those people are receiving benefits under a federal program that extends state payments. Another 1,000 jobless will exhaust their regular state benefits each week thereafter and not be eligible for the extension, division Administrator Renee Olson said.