Who Won Tonight's Fox News-Google GOP Debate in Iowa?

WATCH: Megyn Grills Cruz & Rubio on Past Statements on Illegal Immigration

The Republican presidential candidates faced off one last time before the Iowa caucuses at the Fox News-Google Republican debate.

Watch some of the most powerful moments and intense exchanges below.

Ted Cruz: "If you guys ask one more mean question, I may have to leave the stage" (READ MORE)


Chris Christie rips Marco Rubio and Cruz for denying past statements on immigration: "I feel like I need a Washington to English dictionary"


John Kasich: America can't be policeman of the world


Rubio and Cruz call each other out on their previous positions on illegal immigration (READ MORE)


Megyn Kelly presses Rubio about his record on amnesty (READ MORE)


Megyn asks Cruz about past support for a path to legal status for illegal immigrants (READ MORE)


Rand Paul: War on drugs is disproportionately affecting African-Americans


Ben Carson: "We need to stop allowing political correctness to dictate our policies because it's going to kill us if we don't"


Christie: Hillary Clinton is not qualified to be president


Carson: "You don't have to be a politician to tell the truth"


Marco Rubio: President Obama is "the guy who systematically and habitually violates the Constitution"


Jeb Bush: Donald Trump "was a little teddy bear to me"


Rand Paul and Cruz spar on the NSA and "Audit the Fed" bill


Cruz starts the primetime debate with some Donald Trump-like "insults"

WATCH: Ted Cruz Argues Rivals Are Being Invited to 'Attack' Him

Super PACs Offer to Donate $1.5M to Vets If Trump Debates Cruz One-on-One

Carson Plans to Be 'More Aggressive' at Tonight's Debate