United States Senator from LA


Bill Cassidy is Louisiana's senior Republican senator, a liver-disease physician and Chairman of the Senate HELP Committee in the 119th Congress.
William Morgan Cassidy is the senior U.S. Senator from Louisiana, a Republican first elected in 2014, defeating Democratic incumbent Mary Landrieu, and re-elected in 2020. A native of Highland Park, Illinois, Cassidy moved to Louisiana for medical training and practiced for decades as a liver specialist at the LSU Health Sciences Center, where he helped establish a free clinic for the uninsured. He served in the Louisiana State Senate and three terms in the U.S. House before reaching the Senate. In the 119th Congress, Cassidy chairs the Senate HELP (Health, Education, Labor and Pensions) Committee, becoming the first physician to chair or serve as ranking member since 1933. He also serves on Finance, Energy and Natural Resources, and Veterans' Affairs. As HELP chairman, Cassidy has prioritized literacy, dyslexia support, antisemitism on college campuses, and CDC reform. In 2025, he secured over $669 million in retroactive Social Security Fairness Act payments for Louisianans. He was one of seven Republicans who voted to convict President Trump in the second impeachment trial.