washington president barack obama exhort fellow democrats wednesday preserve legacy-defining healthcare law republicans move ahead long-sought bid scrap vice president-elect mike pence call first order business donald trump administration emerge democratic strategy warn republicans risk throw entire u.s. healthcare system chaos move dismantle 2010 affordable care act popularly know obamacare without plan replace republicans argue system already break help people gain coverage repeal law work minimize disruptions depend obama pence visit capitol hill closed-door discussions obamacare pence indiana governor former member u.s. house representatives meet republican lawmakers plot path forward scuttle law first order business keep promise repeal obamacare replace kind healthcare reform low cost health insurance without grow size government pence tell news conference hall pence obama hand presidency trump jan. 20 urge democratic lawmakers protect signature domestic policy measure tell reporters message look american people democrats acknowledge lack vote need stop repeal legislation push republicans control white house chamber congress trump take office warn risk repeal legislation hop spur public backlash without replacement republicans early 2018 roughly 20 million people gain insurance law could see coverage jeopardy republican plan cut healthcare make america great senate democratic leader chuck schumer tell reporters invoke trump campaign slogan would make america sick lead chaos instead affordable care since law enact republicans congress vote 50 time try repeal part conservatives file suit try invalidate republicans criticize obamacare excessive government intrusion healthcare market contend harm job growth add burden businesses republicans wednesday step rhetorical attack obamacare house speaker paul ryan say law ruin american healthcare system trump write twitter republicans must careful dems fail obamacare disaster poor coverage massive premium increase pence say trump would work congressional leaders smooth transition market-based healthcare reform system legislative executive action republicans offer detail however replacement obamacare would look like ryan say lawmakers would take action pull rug anybody party plenty ideas democratic senator debbie stabenow say republicans pull string go unravel whole healthcare system schumer say effort republicans shift blame democrats would fail want repeal try hang us go happen responsibility plain simple house republican study committee compose conservative members chamber signal aware risk appear plan file bill wednesday could constitute replacement house republicans last year offer proposal would among things provide refundable tax credit help people afford medical insurance premiums obamacare help people obtain insurance increase fund state expand medicaid healthcare program poor provide government subsidies help people obtain coverage private insurers government-run exchange republican senator rand paul doctor join democrats vote begin consideration obamacare repeal resolution paul say support repeal law add current proposal would increase government debt 9.7 trillion next 10 years really republican party represent paul say senate floor debate unite state complicate healthcare system rich nations whose governments provide medical coverage many americans get health insurance employers others buy policies directly private insurers eligible government-run program elderly low-income people 29 million medical insurance 2015 accord recent government statistics u.s. population top 320 million people trump vow protect popular part obamacare bar insurance company deny coverage people pre-existing medical condition republicans make repeal obamacare 'first order business