Congressman DeSaulnier to discuss Social Security, Medicare at Town Hall Residents are invited to attend a town hall hosted by U.S. Rep. Mark DeSaulnier, D-Walnut Creek, on Tuesday, July 29 from 3 to 4 p.m. at the Event Center. Congressman DeSaulnier will address Social Security and Medicare, share the latest from Capitol Hill, and take questions from attendees. This town hall comes