washington u.s. republican senator lamar alexander say tuesday fail reach agreement democrats bipartisan effort stabilize obamacare insurance market statement alexander say democratic senator patty murray work hard good faith find necessary consensus among republicans democrats put bill senate leaders hand could enact alexander murray work protect government payments make insurers help reduce medical expense low-income americans enrol obamacare alexander also want state flexibility design insurance plan program u.s. senator bipartisan deal obamacare repair