washington u.s. republican senator lamar alexander say tuesday would consult democratic colleague patty murray bipartisan deal repair obamacare week pull talk alexander statement say would seek consensus limit bipartisan plan could enact law help low premiums make insurance available 18 million americans individual market 2018 2019 alexander murray work protect payments make insurers compensate discount low-income americans enrol obamacare alexander pull talk week ago republican bill repeal obamacare gain momentum support bill collapse republican senator alexander consult bipartisan healthcare plan