washington republican-controlled u.s. house representatives plan turn tax reform earnest conclude lengthy healthcare debate week vote repeal replace obamacare even republicans predict tax reform would succeed year-end lawmakers encounter new uncertainties final tax package might contain well doubt whether republicans able enact reform without democratic help president donald trump republicans congress pledge complete big tax reform since 1986 president ronald reagan office end 2017. face uphill battle mainly policy differences within rank thursday 217-213 house vote healthcare legislation raise confidence republican-controlled chamber ability move major legislation two early push end failure move forward tax reform house senate trump administration must agree set tax rat pay cut whether final package add deficit pay areas common grind may hard find plan enact reform without democratic support also require republicans pass 2018 budget authorize parliamentary process know reconciliation new budget agreement pose daunt task give republican opposition trump demand deep domestic spend cut may prove one difficult vote tax reform process jonathan traub manage principal consult firm deloitte tax llp meanwhile need reach agreement house senate white house likely delay introduction tax reform bill expect early june republicans say ultimately make easy enact reform end year house ways mean committee unveil initial tax bill still aim revenue-neutral package raise 2.4 trillion tax cut new border adjustment tax elimination business deductions net interest payments controversial measure panel chairman kevin brady tell reporters revenue neutrality necessary ensure bold permanent change tax policy drive economic growth argument case go make senate trump administration say representative mark meadows chair conservative freedom caucus help block trump first healthcare bill voice opposition revenue neutral approach revenue neutral really low tax shift burden meadows tell reporters trump tax plan unveil last week call steep tax cut finance government revenues officials say result high growth fear plan could add trillions dollars deficit growth materialize meadows say tax cut offset cut entitlement program include social security medicare trump promise touch obamacare vote house republicans free turn tax reform