U.S. Senator Pete Ricketts has announced his constituent casework staff will be hosting mobile office hours in Fremont from 1:30 to 2:30 p.m. Tuesday at the Fremont Area Chamber of Commerce, 128 E. Sixth Street. At mobile office hours, Ricketts’ staff will be on-site to assist Nebraskans with their casework needs. If Nebraskans can’t get an answer in a timely manner or believe they have been treated unfairly, Ricketts and his staff may be able t…