Hempstead, New York (CNN) -- President Barack Obama and Republican challenger Mitt Romney face off Tuesday in the second of their three debates, this one in a town hall-style setting in which they'll take questions from likely voters.

The stakes couldn't be higher: Obama must get his campaign back on track after a poor performance in the first debate that left Democrats demoralized and Obama's lead evaporating both in national polls and those in key battleground states. For Romney, who polls among voters showed won the first debate overwhelmingly, a second strong performance would boost his momentum going into the third debate next Monday and the final two weeks before Election Day.

Here are five things to watch for on Tuesday:

1. Connecting with the audience

Unlike the first presidential showdown in Denver two weeks ago, this debate will include a town hall audience of approximately 80 undecided voters, some of whom will get the chance to ask questions to the two candidates.

It's a completely different dynamic than the first face-off between the president and the Republican nominee.

"The challenge is that they've got to connect, not just with the people that are looking into the television and watching them, but to the people that are on the stage with them," the debate's moderator, CNN Chief Political Correspondent Candy Crowley, said.

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"They have to keep those folks in mind. It's a much more intimate and up close adventure with voters. The candidate that makes a connection with the person asking the question is also making a better connection with the person back at home," added Crowley, who's also the host of CNN's "State of the Union."

1. who is the debate's moderator?
2. who is she?
3. what else does she host?
4. is this the first debate?
5. then?
6. what kind of a setting will it be?
7. is the setting of the 2nd similar to the 1st?
8. who is in the debate?
9. what party is Romney?
10. who was better in the 1st?
11. how long before elections is the last one?
12. where was the first one?
13. how many people will be there for the 2nd?
14. what will the audience get to do?
15. how did the democrats feel after the 1st?
16. what day is this debate?
17. and what day is the third?
18. what is the challenge in this one?
19. do they connect just with the audience?
20. then who else?
1. Candy Crowley
2. CNN Chief Political Correspondent
3. "State of the Union"
4. No
5. 2nd
6. Town hall
7. No
8. Barack Obama and Mitt Romney
9. Republican
10. Romney
11. Two weeks
12. Denver
13. About 80 undecided voters, other numbers unknown
14. Ask questions
15. Demoralized
16. Tuesday
17. Monday
18. To connect with voters
19. No
20. To the people watching on TV, and in person.