I would like to know where all the candidates stand on the robot uprising. pic.twitter.com/v23gh95nYA

— Mark Hemingway (@Heminator) February 1, 2016

Watch: a Donald Trump supporters explains why he's going to caucus for him tonight #iacaucus pic.twitter.com/MwdgewHrzg

— Sebastian Payne (@SebastianEPayne) February 1, 2016

Interesting that Cruz and Trump are splitting evangelicals based on entrance polls via @FoxNews

— David Gregory (@davidgregory) February 2, 2016

Who will win the Iowa Taco Caucus!?!?

— el Sooper ن (@SooperMexican) February 2, 2016

Rowing dude don't care about the Iowa caucuses pic.twitter.com/dlCLalpTcr

— Jon Ward (@jonward11) February 1, 2016

I grew up in Iowa. I've never seen a caucus so packed as this one in Cedar Rapids. Thousands of people, wall to wall pic.twitter.com/7zW3Z0i530

— Benny (@bennyjohnson) February 2, 2016

.@tedcruz, @realDonaldTrump neck-and-neck for largest share of @twitter conversation in the last week in Iowa: pic.twitter.com/BoPhjpbxss

— ABC News Politics (@ABCPolitics) February 2, 2016

An Iowa caucus goer just told an NPR presenter that she was supporting Trump because of the way he rebuilt the World Trade Center.

— Matthew Garrahan (@MattGarrahan) February 2, 2016

.@realDonaldTrump stops at another caucus. #IACaucus #IowaCaucus #CaucusForTrump @CLewandowski_ @KeithSchiller45 pic.twitter.com/l8Pl7rrPoM

— Daniel Scavino Jr. (@DanScavino) February 2, 2016

No Rubio supporter designated here in his stronghold of Waukee. Audible gasps. He could win this precinct

— Josh Kraushaar (@HotlineJosh) February 2, 2016

Solid speech from Trump supporter here. Talks about need to win over Blue Dog Ds. But audible groans too pic.twitter.com/qL43VszT4H

— Josh Kraushaar (@HotlineJosh) February 2, 2016

. @Jamie_Weinstein caucusing for Gilmore "Slow & steady wins the race & no one has started slower than Jim Gilmore" pic.twitter.com/e9CYjMssXF

— Michelle Fields (@MichelleFields) February 2, 2016

Marco Rubio wins narrowly in Des Moines #44 over Donald Trump #iacaucus pic.twitter.com/g3TE1s7UfB

— Jennifer Jacobs (@JenniferJJacobs) February 2, 2016

Cruz now narrowly leading Trump. Clinton ahead of Sanders.

— Cordelia Lynch (@CordeliaSkyNews) February 2, 2016

Carson statement: Ben is not suspending his campaign, he just "needs to go home and get a fresh set of clothes." pic.twitter.com/juvgvOpRrl

— Jessica Taylor (@JessicaTaylor) February 2, 2016

Jeb Bush is projecting to win one Iowa caucus vote for every $25,000 spent by Right to Rise. https://t.co/r2tI2Y0rV1

— Nate Silver (@NateSilver538) February 2, 2016

Massive massive turnout. Unreal at this point. #iacaucus #ourcaucus printing more ballots… pic.twitter.com/PH2Qo0EK7A

— Richard Dedor (@RichardDedor) February 2, 2016

PROJECTED turnout for Republicans: 170,000, GOP leaders tell me. #iacaucus

— Jennifer Jacobs (@JenniferJJacobs) February 2, 2016

OTHER is still beating Gilmore pic.twitter.com/UhTyqhvflB

— Right Scoop (@trscoop) February 2, 2016

We project that Ted Cruz has won the 2016 Iowa Caucus.

— Decision Desk HQ (@DecisionDeskHQ) February 2, 2016

JUST IN: Martin O'Malley to suspend his presidential campaign tonight, sources tell @ABC News – @ABCPolitics

— ABC News (@ABC) February 2, 2016

We couldn't have said it better ourselves. #iowacaucus https://t.co/2sBlrda7BA

— Free Beacon (@FreeBeacon) February 2, 2016

.@realDonaldTrump's campaign right now, at long last pic.twitter.com/Av5Yzu1JIb

— Jason Hart (@jasonahart) February 2, 2016

65% IN:
CRUZNADOOOO AT 28.1%!!!!!!!!
TRUMP 24.9%
RUBIO 22.1%
Carson 9.5%@SaintRPh -9%@TRScoop – 4 taco bell tacos#IowaCaucus

— el Sooper ن (@SooperMexican) February 2, 2016

.@brithume: “If @tedcruz goes on to win this, he’s the winner.” #IowaCaucus #YouDecide2016 https://t.co/ldvlLCmXt1 pic.twitter.com/CSIXGclftH

— Fox News (@FoxNews) February 2, 2016

We have 97% of GOP vote in. Cruz up 28-24 over Trump. But Rubio is just 2200 votes behind Trump and is at 23%

— Chuck Todd (@chucktodd) February 2, 2016