washington senate republican tax plan would repeal obamacare mandate give permanent tax cut u.s. corporations draw fire two republican lawmakers wednesday could sign trouble sweep measure republican senator ron johnson wisconsin say would support current senator proposal separate tax bill debate house representatives believe unfairly benefit corporations kinds enterprises include small businesses senator susan collins one three republicans oppose republican obamacare repeal effort early year warn middle-income taxpayers could see tax cut wipe high health insurance premiums repeal affordable care act mandate go view could signal problems senate republicans want pass tax legislation december afford lose two vote rank 52-48 majority senate democrats call republican tax plan giveaway rich corporations neither house senate bill provide fair treatment support either current version johnson say statement add would still work republican colleagues produce good legislation senate republicans produce new plan late tuesday would guarantee permanent tax cut corporations temporarily low tax bill individuals small businesses tie overall package effective repeal key part obamacare former democratic president barack obama signature healthcare law expose tax-cut initiative political risk wreck mid-2017 anti-obamacare push republicans senate tax committee chief orrin hatch unveil amendment defend helpful middle class collins maine republican tell reporters add mandate repeal mistake go difficult know complicate bring aca say several moderate republicans include collins john mccain say support tax plan new republican plan hatch say committee meet would expand child tax credit slightly reduce middle-class tax rat take together change let us channel even tax relief middle class say change would temporary deep cut corporate tax rate would permanent hatch plan widely expect become main vehicle republicans efforts revamp tax code year end effort see republicans critical prospect retain power washington november 2018 congressional elections far republicans president donald trump major legislative victories 2017 show voters despite control white house congress hop tax cut fix problem make progress recent days trump tour asian capitals return late tuesday schedule meet lawmakers thursday house begin debate tax bill wednesday full vote expect thursday senate house tax plan must eventually reconcile merge final plan pass chamber go trump sign law include effective repeal obamacare individual mandate senate republicans likely end possibility gain support democrats another garden variety attack affordable care act aca repeal law say senator ron wyden finance committee top democrat blast republicans set double standard guarantee permanent tax cut corporations individual mandate clause obamacare require healthy young people buy insurance pay federal penalty aim hold coverage cost sick old repeal penalty republicans would raise 318 billion decade pay tax cut accord joint committee taxation nonpartisan unit congress nonpartisan congressional budget office separately estimate last week repeal mandate would increase number uninsured americans 13 million 2027. trump back inclusion mandate repeal tax bill republican conservatives senate house u.s. house speaker paul ryan tell cnbc wednesday house tax plan repeal mandate republicans chamber would likely approve final measure hammer senate include hatch senate plan would also expand access deductions pass-through businesses increase child tax credit 2,000 early propose 1,650 benefit would expire end 2025. change would still allow measure comply deficit requirement must meet senate republicans pass legislation simple majority senate tax plan require add 1.5 trillion 10 years federal deficit national debt otherwise senate republicans would need 60 vote two senate republicans critical party 's tax plan