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Wisconsin Gov. Scott Walker, who helped Mike Pence prepare for the VP debate by playing the role of Tim Kaine in mock debates, shared insight on how last night went on "America's Newsroom" today.

Walker said that Pence clearly won, and Kaine was even more scripted than they anticipated during the debate preparation.

"I think my lines weren't even as canned as his were last night," Walker said. "I took all the language that I heard Tim Kaine say for months and, in some cases, even years. He repeated almost word for word exactly the things that I said during debate prep."

He added that they expected Kaine to play the role of Hillary Clinton's "attack dog" and go after Trump, which is exactly what he did.

"He put one attack after another after another," Walker said. "I thought Mike Pence did a nice job at not only knocking back those attacks, but then answering the question and refocusing the attention."

The Wisconsin governor said the most important choice a presidential candidate makes is choosing a running mate, and the American people saw the difference between Pence and Kaine last night.

Watch more above.

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