des moines iowa hillary clinton struggle iowa fend underdog bernie sanders self-described democratic socialist reignite question ability close deal democratic voters turn pressure high-profile white house campaign democratic presidential front-runner whose campaign run rail iowa 2008 barack obama deal another setback monday midwestern state begin 2016 race presidency former secretary state clinton 68 push virtual tie sanders 74-year-old u.s. senator vermont next new hampshire hold primary feb. 9. sanders lead opinion poll advantage neighbor home state clinton loss would start set alarm bell supporters every possible structural organizational advantage sanders fight draw say dan schnur director jesse m. unruh institute politics university southern california almost moment moment rerun 2008 schnur say difference competition tough time clinton insist post-caucus rally candidate could unify party prevail republican challenger nov. election sense disappointment palpable subdue six-minute speech contrast ebullient tone sanders 16-minute speech clear victory announce clinton campaign scrap plan daughter chelsea husband former president bill clinton introduce stand alongside instead bill clinton wear campaign logo badge upside-down aid remove teleprompter last minute supporters drake university rally tell reuters indication last-minute change plan race iowa tighten recent weeks aid appear draw confidence des moines register/bloomberg politics poll weekend show clinton three-percentage-point lead sanders among likely caucus-goers early hours tuesday morning clinton sanders remain separate less single percentage point race tight several precincts force decide whether clinton sanders get win vote one delegate coin toss follow state democratic party advice msnbc television network finally call race clinton nearly a.m. cst 0900 gmt clinton iowa state director matt paul issue statement declare victory uncertainty opinion poll show clinton still face enthusiasm gap sanders republican rival whose race attract record turnout iowa voters persistent doubt honesty trustworthiness months controversy use private email server government work secretary state sanders launch campaign nine months ago small sparsely attend news conference capitol hill excite liberal activists anti-establishment message call eradicate income inequality break big bank provide free college tuition iowa good state test message give heavy liberal bend democratic activists dominate caucus process entrance poll iowa caucus-goers show 68 percent describe somewhat liberal fundraise figure report sunday sanders underscore extent campaign grow popular movement clinton raise sanders campaign bring 109 million last year compare 73.5 million 75 percent haul come donations 200 less contrast 18 percent clinton far clinton donors hit 2,700 donation limit still sanders face significant challenge democratic nominate contest move diverse state nevada south carolina expand 11 state march super tuesday include seven south clinton advantage african-american voters could begin pay iowa build bernie sanders say democratic strategist joe trippi nevertheless say strong show sanders mean race go long clinton want to additional report jonathan allen washington edit caren bohan howard goller sap sponsor coverage independently produce staff reuters news agency virtual tie raise doubt hillary clinton close deal