S. 2259 · 114th Congress ACO Assignment Improvement Act of 2015 StageIn committee SponsorMaria Cantwell Introduced2015-11-09 Latest action2015-11-09 · Introduced in Senate Follow Summary Text Subjects Cosponsors (3) Votes (0) Actions Cosponsors (3) Jon Tester Former member Senate MT Democrat Patty Murray Current member Senate WA Democrat John Thune Current member Senate SD Republican