National Nurses United, with nearly 225,000 members nationwide, is the largest union and professional organization of direct-care registered nurses in the United States and a strong, progressive voice for nurses, patients, and health care workers around the world. NNU's executive director is Bonnie Castillo, RN and its presidents are RNs Deborah Burger, Nancy Hagans, Jean Ross, and Zenei Triunfo-Cortez. NNU affiliates include the District of Columbia Nurses Association, Michigan Nurses Association, Minnesota Nurses Association, New York State Nurses Association, and California Nurses Association/National Nurses Organizing Committee, which represents nurses at facilities in Alabama, Arizona, California, Colorado, District of Columbia, Florida, Georgia, Iowa, Illinois, Kansas, Kentucky, Maine, Missouri, Nevada, North Carolina, Ohio, Texas, Virginia, West Virginia, and Puerto Rico. NNU affiliate members are renowned as leading advocates of guaranteed health care, fighting for expanding and updating Medicare to cover all people in the United States, for negotiating many of the best collective bargaining contracts for RNs in the nation, and for sponsorship of innovative legislation and regulatory protections for patients and nurses.