washington two u.s. senators party close finalize bipartisan deal shore health insurance exchange create obamacare chamber top democrat say thursday move senate democratic leader chuck schumer say verge completion would stabilize market individuals buy insurance plan federal state-based exchange potential agreement come republicans repeatedly fail carry years-long pledge repeal replace 2010 affordable act former democratic president barack obama signature healthcare overhaul schumer say senate health education labor pension committee chairman lamar alexander republican rank democrat patty murray resurrect bipartisan approach cast aside amid late near-vote repeal bill 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 inform verge agreement bipartisan healthcare agreement stabilize market low premiums schumer say senate floor thursday pact could buoy health insurance company come forcefully republican repeal effort face uncertainty since november election republican president donald trump vow sink law majority insure americans receive coverage employers government program medicare medicaid 10 million people individual plan online exchange 11 million expect sign next year consumers receive income-based tax credit subsidies reduce cost insurers file premium rat 2018 many expect rise least 20 percent uncertainty government continue pay subsidies despite worry insurers wednesday sign contract government result every u.s. county least one company sell obamacare plan trump signal administration would take action unwind law wednesday say would sign order next week allow people buy insurance coverage across u.s. state line republican senator rand paul push move say trump legalize nationwide health associations individuals could join senators close bipartisan deal health exchange schumer