Des Moines, Iowa (CNN) - Iowa Republicans will gather at 809 caucus sites across Iowa Tuesday, casting the first votes of the 2012 presidential election. Check back here for updates from our reporters and producers throughout the Hawkeye State. Tune in live on CNN's live special coverage and follow real-time results on CNNPolitics.com and on Twitter at #cnnelections. Read more here. The Iowa contenders are former Massachusetts Gov. Mitt Romney, Rep. Ron Paul of Texas, former House Speaker Newt Gingrich, former Sen. Rick Santorum of Pennsylvania, Texas Gov. Rick Perry and Rep. Michele Bachmann of Minnesota.
3:04 a.m. ET - Iowa 2012 was the closest Republican presidential contest in history, beating the 1936 South Dakota primary, won by Alf Landon with a 257-vote margin, according to CNN Polling Director Keating Holland. It's also the closest Iowa caucus result in history. The previous record was set in 1980, when the elder George Bush beat Ronald Reagan by about two percentage points. But Obama beat Hillary Clinton in the 2008 Guam caucus by seven votes.
3:02 a.m. ET - Of the 25 delegates at stake in Iowa on Tuesday night, the CNN delegate estimate shows Romney, Santorum and Paul with 7 votes, followed by Gingrich and Perry with 2 votes.
2:58 a.m. ET - @JohnKingCNN: early november: gov branstad sealed envelope w/this prediction.Right-by 8 votes!! #cnnelections yfrog.com/es9emhj
2:57 a.m. ET - @JayMcMichaelCNN: #Edith #cnnelections pic.twitter.com/NdlV7Em1
2:46 a.m. ET - #Edith and #Carolyn, veterans of Iowa politics, appeared on CNN again after Romney was declared the winner. Edith Pfeffer said she was "amazed, really."
2:43 a.m. ET – @SamFeistCNN: The Clinton County ladies had the right numbers when they were on #CNNElections. #Edith and Carolyn nailed it. Romney wins.
2:37 a.m. ET - @LisaDCNN: CLOSEST GOP CONTEST IN U.S. HISTORY: just happened. Iowa's 8-vote margin beats previous S. Dakota 1936 margin of 257.
2:33 a.m. ET – Romney won the Iowa caucuses by eight votes, Republican Party of Iowa Chairman Matt Strawn announced. Romney received 30,015 votes and Santorum received 30,007 votes, according to the Iowa GOP.
2:26 a.m. ET – @LisaDCNN: RECAP: CNN's found the two women who lead Clinton County and who were awoken after midnight to try and sort out where missing results were.
2:24 a.m. ET - @JohnKingCNN: There's #magicwall and then there is #madness!!! Opening night #2012 loooOng. yfrog.com/kg836gfj
2:20 a.m. ET - @LisaDCNN: FOR THOSE NOT WATCHING: CNN had two women – ldrs in Clinton County recount tonight's mix-up and keep @JKUSA in line when he ?d their #s
2:18 a.m. ET - Romney camp tells CNN it's been told by the state GOP that he will win by 14 votes.
2:16 a.m. ET – @MeganGrantCNN: About two dozen Romney campaign staff just ran out onto the now empty floor at his HQ and started cheering and high-fiving in celebration.
2:01 a.m. ET - @LisaDCNN: CLINTON COUNTY – Results Sent: The chairwoman of the Clinton County GOP told me they sent the results at 7:36p ET. She sounded frustrated.
(CNN) - Rick Santorum rode a largely evangelical wave of support to finish eight votes behind Mitt Romney in the Iowa Republican caucuses Tuesday night, according to CNN entrance polls, but the evangelical bloc nonetheless appeared to be seriously splintered.
Santorum garnered 34% of evangelical caucus-goers, according to entrance polls, the libertarian Ron Paul garnered 18%, while Mitt Romney, Newt Gingrich and Rick Perry each took 14% of that vote. Michele Bachmann won 6% of evangelical caucus-goers and Jon Huntsman won 1%.
TOPICS: Attitudes of likely GOP primary voters in New Hampshire who watched news coerage of Iowa caucuses on January 3.
Full results (pdf)
(CNN) - President Barack Obama addressed via video conference several Democratic caucus sites in Iowa Tuesday, four years after winning the state's contest in a surprise victory that fueled his campaign on a path to the nomination.
"We've still got a lot of work to do. But think about the change that was accomplished because of those caucuses four years ago," Obama said.
If you're away from your TV or computer tonight, don't worry. You can use the CNN apps on your phone or tablet to stay up to date on the Iowa caucuses. Here's a rundown.
Live video and CNN TV
Throughout the night you can watch live video from the Iowa caucuses and from candidate headquarters in the live video sections of the CNN apps for iPhone, iPad and Android. (You can also watch on CNN.com or of course on CNN TV).
If you subscribe to a multi-channel video service, you can watch the CNN TV feed live in the CNN app for iPhone or iPad.
Iowa stories and opinion articles
All CNN mobile apps and the mobile web site have the latest stories and opinion pieces.
Special Election Center sections
Make sure to update your CNN app for iPad, Android phone and Android tablet for access to the new "Election Center" section, which includes live blogging from the Political Ticker.
Visit cnn.com on your mobile phone browser for live results. Live results can also be viewed in the Election Center of the CNN app for iPad.
Des Moines, Iowa (CNN) – Newt Gingrich will hit GOP presidential rival Mitt Romney as a "timid Massachusetts moderate" in a New Hampshire newspaper ad on Wednesday.
The full-page ad, set to run in the influential Union Leader, comes less than one week before the state's first-in-the-nation primary on Jan. 10.
(CNN) – Former Republican presidential candidate Herman Cain said Tuesday he had no immediate plans of running for public office again.
But on CNN's "John King, U.S.A.", Cain added he still hopes to play a large role in the political process, saying he believes "the Republican Party is not focused enough."
(CNN) – Before the first ballots are cast in Iowa Tuesday night, Mitt Romney can claim a small lead in the race to win the Republican presidential nomination.
The former Massachusetts governor has secured the early public support of 11 of the 1,144 delegates needed to win the nomination, compared to two for Texas Gov. Rick Perry and one for former Pennsylvania Sen. Rick Santorum.
CNN Live: Tune in tonight at 7 p.m. ET for CNN's live special coverage of the Iowa Caucuses and follow real-time results on CNNPolitics.com and on Twitter at #cnnelections. Stay up to date with CNN apps for iPhone, iPad, Android or other phones.
(CNN) - Rick Perry vowed to carry on campaigning if he finishes poorly in Iowa Tuesday, saying on CNN that results from the first-in-the-nation caucus weren't the be-all end-all in the presidential election.
"I'm headed to South Carolina, the plane will be warmed up in the morning and we'll be heading to Aiken, South Carolina to continue on," Perry said on CNN's "John King, USA."
(CNN) - Ron Paul's campaign touted support from a family member of one of his rivals on Tuesday, just hours before the Iowa caucuses.
John Garver, 19-year-old nephew of surging Republican presidential candidate Rick Santorum, urged voters to pick Paul over his uncle.