Not since 1980, arguably, has one debate carried such significance. And other than 2004, it's hard to isolate a debate on foreign policy that could decide who wins the next election.
But this last debate isn't just about foreign policy. It's about something much bigger. It's about leadership and decision-making. It's about confidence and strength of purpose. It's about what kind of president the American people can expect in the face of international crisis.
In a race like this, where the few undecided voters are looking for a good reason -- really, any reason -- to make their final choice, these arguments and this debate will make the difference. All that being said, click through the slides below to see what you should be watching for tonight.
Chris Kofinis is a Democratic strategist. Frank Luntz is a Republican pollster and strategist. AOL has an elections content partnership with Chris Kofinis and Luntz Global.