new york even week trump administration congress rekindle optimism could soon make progress pro-growth agenda include tax cut unexpected fire head fbi late tuesday present investors fresh reason second-guess confidence trump trade least financial market participants view president donald trump abrupt dismissal fbi director jam comey unwelcome distraction fret could tie washington knot months potentially postpone already-delayed reform takeaway stock market bet quick legislation around trade budget healthcare infrastructure nothing good market say michael purves chief global strategist weeden co. weigh trump ability cut deal congress cost negotiate leverage jack ablin chief investment officer bmo private bank say medium-term basis undermine administration power get things do trump 's election last november unleash powerful upswing u.s. stock market premise would cut tax regulation usher major infrastructure spend package benchmark 500 .spx gain 12 percent since election day share tech stock small company perform even good nag concern trump ability get things do along anxiety stretch equity valuations combine cap rally stock do little since early march around midday wednesday near unchanged market benchmarks administration recover credibility last week house representatives vote repeal major portion former president barack obama affordable care act fail month early simple achievement advance healthcare bill senate see investors signal enact tax cut doable big question soon year next tremendous amount hope bake market trump go able act particularly tax reform say brad mcmillan chief investment officer commonwealth financial waltham massachusetts edward perkin chief equity investment officer eaton vance say date pass tax push much problem people question ever happen problem degree alienate democrats capitol hill especially senate another concern give narrow support far trump agenda sen. dianne feinstein senior democratic lawmaker california optimistic tensions party would ease anytime soon hopeful could line activity go bring divide country together feinstein tell reuters wednesday problem people divide comey episode weaken trump bargain ability lawmakers may actually act catalyst tax bill one might resemble congressional republicans version trump ongoing special investigation shift balance power could actually make trump eager sign previously exist congressional tax plan analysts natwest market say course already adopt view trump promise reform distant hope best investors realize fiscal policy agenda push farther horizon michael arone chief investment strategist state street global advisors stt.n delay see trump growth agenda comey sack