washington mitch mcconnell u.s. senate top republican cling slim hop tuesday party could still dismantle obamacare despite adequate support repeal bill face possibility another failure make good 7-year-old pledge roll back healthcare law mcconnell tell senators debate healthcare would continue say nothing whether would bring repeal bill vote leave open option let measure simply die firm vote nail republicans vow years get rid 2010 affordable care act obamacare sept. 30 deadline pass bill simple majority face much tough path toward dismantle senator susan collins rebuff intense lobby fellow republicans promise money state decide monday oppose likely doom late effort repeal obamacare blow president donald trump make undo democratic former president barack obama signature healthcare law top priority since 2016 campaign pressure collins call monday republicans hold slim 52-48 majority senate least two republican senators john mccain rand paul already reject bill vote mccain collins another republican lisa murkowski kill effort senate undo obamacare july obamacare extend health insurance 20 million americans many republicans believe unwarranted costly government intrusion healthcare also oppose tax impose wealthy mcconnell open senate tuesday praise measure sponsor republican senators lindsey graham bill cassidy say contrast sharply democratic proposals single-payer healthcare important debate country mcconnell say one certainly continue graham-cassidy bill would take federal money spend medicaid program poor disable well subsidies help americans buy private insurance divvy state block grant one main complaint opponents bill would mean sweep cut fund medicaid republican mcconnell hold hope obamacare repeal