washington u.s. house representatives speaker paul ryan thursday reject speculation future tax legislation could include temporary tax cut businesses say macro-economic elements tax reform include rat must permanent passionately believe permanence important big decision-making provision tax code stuff get permanent ryan say interview cnbc television things time date make sure number work big macro-economic policies rat things like stuff make permanent ryan also say republicans intend keep popular homeowner deduction mortgage interest payments talk cap help pay tax cut indicate deduction could change recognize acknowledge believe need maintain mortgage interest deduction whether improve work discussion ongoing basis ryan say president donald trump republicans congress vow slash business tax rat overhaul u.s. tax code year end republican-only strategy require special parliamentary procedure get legislation senate simple majority republicans control senate 52-48 margin struggle find ways pay low rat without violate senate rule expand federal deficit outside 10-year budget window lobbyists say closed-door discussions congress trump administration consider approach would make tax cut sunset decade avoid senate rule violation without permanent tax rat ryan say businesses would less likely make multi-year multibillion-dollar investments necessary drive economic growth republicans say ultimate goal say budget process might want go temporary actually work way say permanence work permanence necessary permanence absolutely doable house speaker ryan say rat must permanent tax reform