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

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According to a focus group of Iowa Republican voters, Marco Rubio was the big winner of Thursday night's Fox News-Google GOP debate.

The participants nearly unanimously agreed that the most powerful and impactful moment of the debate was when Rubio answered Megyn Kelly's tough question on illegal immigration and amnesty.

"We are not going to round up and deport 12 million people, but we're not going to go around handing out citizenship cards either," Rubio said. "There will be a process. We will see what the American people are willing to support. But it will not be unconstitutional executive orders like the ones Barack Obama has forced."

Members of the focus group gave the Florida senator a round of applause, describing him as confident, eloquent, believable, presidential and electable.

In particular, they liked that he mostly refrained from attacking his fellow candidates and instead focused on his positive, aspirational message.

Rubio also had the highest-rated moment of the night when he criticized the leading Democratic candidates, saying that Bernie Sanders is qualified to be president of Sweden and Hillary Clinton is simply unqualified to be commander-in-chief.

The focus group said that Rubio's powerful criticism of the Democrats shows that he's the Republican candidate who is most electable and who is most likely to prevail in November.

Watch more from the focus group above.

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