republicans plan dismantle obamacare approve late month u.s. house representatives clear initial hurdle last week would go next senate fate uncertain least nine republican senators express concern plan move forward house without clear assessment impact federal budget would impact level health insurance among americans plan would roll back much former democratic president barack obama 2010 affordable care act retain part substitute new part democrats say go far republican conservatives say go far enough republicans dominate house 52 seat 100-seat senate supporters republican plan would need simple majority pass current plan republican senators raise question house plan outright oppose senator rand paul kentucky call plan obamacare lite say stop short full repeal reintroduce bill repeal obamacare approve republicans little year ago veto obama senator ted cruz texas cruz reportedly say march significant concern plan could pass senate current form add would work hard improve night family din white house republican president donald trump express support house plan senator mike lee utah say march plan step wrong direction express concern know much would cost whether would make health care affordable senator tom cotton arkansas march urge house pull back say plan could pass senate without change senator susan collins maine concern house bill vote repeal obamacare little year ago would take federal fund women healthcare provider plan parenthood also provide abortion service current house bill would strip fund plan parenthood senator rob portman ohio three senators raise concern letter last week feb. 10 draft house plan say want sure protect people enrol obamacare medicaid expansion senator cory gardner colorado sign letter concern plan march telephone town hall gardner reportedly say whether current house bill meet standards medicaid senator lisa murkowski alaska also sign letter concern plan effect medicaid senator shelley moore capito west virginia sign letter concern medicaid impact republican senators wobble house obamacare plan