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Republican debate
A welcome sign is seen before the second official Republican presidential candidates debate of the 2016 U.S. presidential campaign at the Ronald Reagan Presidential Library in Simi Valley, California, United States, September 16, 2015.REUTERS/Lucy Nicholson
  • The "undercard" debate featuring the following candidates-- Lindsey Graham, Rick Santorum, Bobby Jindal and George Pataki--has wrapped up. Analyst on CNN and data from Google Trends reveals Lindsey Graham is the winner of the earlier debate.
  • The main debate, which starts at 8pm EST, will feature the remaining 11 candidates: Donald Trump, Ben Carson, Carly Fiorina, Jeb Bush, Marco Rubio, Ted Cruz, Chris Christie, John Kasich, Scott Walker, Rand Paul and Mike Huckabee.
  • Only 15 candidates, of the 16 candidates, will participate in the second GOP debate after former Texas Governor Rick Perry became the first candidate to end his White House bid. Former Virginia Governor Jim Gilmore did so poorly in the polls he did not qualify for either debate.
  • For those who want to catch the debate online, CNN will make the entire debate available for free at CNN.com.
04:23

Minutes after the wrap up of the main debate, analyst and Twitter appear to agree that Carly Fiorina came out on top. According to Google Trends, Donald Trump, Fiorina and Jeb Bush were the top three searched candidates during the debate.

04:14

After five hours of two debates, the second Republican debate has concluded.

03:48

Rubio and Christie debate both climate change and the measures Democrats hope to pass to reduce pollution. Christie goes as far as to say that climate change is a "left wing" idea.

03:41

The conversation quickly moved from the 2nd Amendment to Social Security. Trump says he would be willing to opt out of Social Security.

03:30

Moderators now are asking a question from social media: "Would you enforce the federal laws against marijuana in places like Colorado where it's legal?"

Paul says he believes in the 10th Amendment and that the federal government should not interfere with the state's right to decide whether marijuana is legal or not.

03:06

The war in Iraq and Jeb Bush's older brother, former President George W Bush's, is now a hot topic. Trump and Paul voice their opposition to the war and said the world is a less safe place because of it. Bush and Rubio, however, that President Bush should not be blamed for the current situation in the Middle East.

02:57

Marco Rubio calls Donald Trump on failing to know enough about foreign policy, saying the next president needs to know from "day one" how to keep the US safe. Trump responds by attacking Rubio's record on voting in the Senate.

02:42

Taxes is up next: Huckabee suggests eliminating taxing those who "produce." Meanwhile, Ben Carson discusses his plan of bringing in tithing, or a one/tenth tax. Surprising to many, Trump advocates taxing high earners more.

02:34

For a refresher on the 14th Amendment, which is discussed in the debate on birthright citizenship.

All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside. No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.

02:27

Talk turns to immigration. Trump argues that undocumented immigrants should be deported, the US borders should be strengthened and immigrants should learn English. Rubio, who has worked for comprehensive immigration reform, says the border should be secured but largely disagrees with Trump's plans.

02:13

After claiming he would take care of women and respect women if elected, Trump is called out for his comments on Carly Fiorina's face in his interview with Rolling Stone. Fiorina says that she believes "women all over the country" understood what Trump meant in his comments.

02:01

01:58

As the predominately male candidates on stage discuss defunding Planned Parenthood, and potentially shutting down the government, Democratic front-runner Hillary Clinton tweets:

01:51

While many of the candidates go after President Obama about failing to interfere in Syria, Rand Paul argues that bombing Syria may have made it easier for Isis to gain control of Damascus. Meanwhile, Ted Cruz discusses Iran and its attitudes against Israel and the US.

01:41

Like the first debate, Carly Fiorina is showing voters she is incredibly well versed in the issues. When discussing the issue of Russia presence in Syria. Fiorina outlines her foreign policy, saying, "Russia is a bad actor. But Vladimir Putin is someone we should not talk to."

01:35
GOP Debate
Republican U.S. presidential candidates (L-R), U.S. Senator Lindsey Graham, former New York Governor George Pataki, former U.S. Senator Rick Santorum, U.S. Senator Rand Paul, former Arkansas Governor Mike Huckabee, U.S. Senator Marco Rubio, U.S. Senator Ted Cruz, Dr. Ben Carson, businessman Donald Trump, former Florida Governor Jeb Bush, Wisconsin Governor Scott Walker, former CEO Carly Fiorina, Ohio Governor John Kasich and New Jersey Governor Chris Christie pose at the start of the second official Republican presidential candidates debate of the 2016 U.S. presidential campaign at the Ronald Reagan Presidential Library in Simi Valley, California, United States, September 16, 2015.REUTERS/Lucy Nicholson

01:29

John Kasich gets applause after he calls out CNN moderators and his fellow candidates on stage for not talking about the issues and instead taking part in the back and forth.

01:22

Like the first debate, the first questions in the main event turn to GOP front-runner Donald Trump. Female candidate Carly Fiorina does not take the bate and says she trust the American voters to do the right thing. In his response, Trump calls out Rand Paul.

Paul says that Trump cannot be trusted with his finger on the nuclear codes. Trump's response:

01:20

Democratic candidate, Bernie Sanders, may not be on stage with the 11 GOP candidates but he has joined the debate via Twitter. As the candidates introduce themselves, Sanders tweets the following: