Will Trump’s preparation pay off?

(NBC News) Donald Trump and Hillary Clinton are in debate prep mode again, getting ready for their second face-off. It’s now just three days away.

Clinton is behind closed doors with her team, studying policy.

Trump is doing just the opposite, going public with a town hall in New Hampshire Thursday night, practicing Sunday’s format.

Sunday’s debate will be different, with half the questions are coming from the audience, testing the nominees’ ability to go one-on-one and connect with undecided voters.

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