National Committee to Preserve Social Security and Medicare

The National Committee was founded in 1982, is headquartered in Washington, D.C., near Capitol Hill. The National Committee acts in the interests of its membership through advocacy, education, services, grassroots efforts and the leadership of the board of directors and professional staff. Wikipedia*

On the C-SPAN Networks:
National Committee to Preserve Social Security and Medicare has hosted 1 event in the C-SPAN Video Library; the first program was a 2012 Forum.