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Luke Russert: Five questions for tonight

In his latest entry over at iCue's Off Air blog, NBC's Luke Russert asks five big questions about tonight's debate.   Here's a preview:

Will either Obama or McCain go for a knockout punch?
Usually when there are three debates, candidates hold back until the last debate because they don't want to say anything stupid or appear overbearing. Presidential debates are different because more people watch the first one than the other two. So this presents an interesting dilemma: both candidates have the biggest audience they may ever have tonight. They have the opportunity to showcase their abilities and to demonstrate why the other guy is wrong, but do they take advantage of that opportunity?

To read more of Luke's blog, visit Off Air here.