washington u.s. senate delay consideration healthcare legislation arizona republican senator john mccain recuperate surgery senate republican leader mitch mcconnell say saturday mccain absence cast doubt whether senate would able pass legislation dismantle replace obamacare mcconnell need 50 yes vote passage chamber republicans control 52-48 margin john recover senate continue work legislative items nominations defer consideration good care act mcconnell say statement announcement come mccain office say would remain arizona next week follow procedure remove 2-inch 5-cm blood clot leave eye repeal replace president barack obama signature healthcare law top campaign promise president donald trump republicans congress two republican senators already declare opposition revise legislation unveil thursday mccain express concern healthcare bill say would vote 2008 republican presidential nominee mccain rest comfortably home good condition friday operation office say people tough friend john mccain know back us soon mcconnell say mccain surgeons remove clot minimally invasive craniotomy incision 80-year-old lawmaker eyebrow tissue pathology report would available within next several days thank mayoclinic excellent care appreciate support look forward get back work mccain chair senate arm service committee say social network twitter late saturday senate delay healthcare vote mccain recover surgery