washington u.s. republican senator involve u.s. tax reform negotiations say monday expect share trump tax reform plan lawmakers hold hear overhaul tax code go hear first go share time senate finance committee chairman orrin hatch member big six tax reform policymakers tell reporters want everybody participate know want anybody feel like consult add hatch committee schedule hold hear individual tax reform thursday lawmaker say hear could follow timeline suggest members congress may get look emerge tax reform plan last week september early house representatives schedule recess next week recently friday house republicans say expect learn early week tax reform framework big six senior tax policymakers congress trump administration six hatch senate republican leader mitch mcconnell house speaker paul ryan house ways mean committee chairman kevin brady treasury secretary steven mnuchin white house economic adviser gary cohn negotiate months hammer deal tax reform president donald trump republicans congress campaign last year promise slash individual business tax part tax reform package would also simplify sprawl u.s. tax code trump say weekend would call congress speed process big six yet finalize agreement lobbyists say group still undecided basic elements tax reform plan include whether tax legislation add federal deficit revenue-neutral lack progress erode hop complete tax reform end 2017 frustrate efforts pass budget resolution contain vital procedural tool need move tax legislation forward simple majority senate republicans control 52 48 seat mnuchin cohn expect discuss prospect budget resolution tuesday meet members senate budget committee 'big six member say tax reform blueprint follow senate hear