I noted that Obama didn't sit well in interviews. His other problem is that he doesn't cast his answers in terms that are advantageous to him.
Here's how I'd answer some common questions if I were Obama:
Q: Why don't you admit "the surge" worked?
A: The surge is a great step forward. Unfortunately, it's only one step forward after five steps backwards. It doesn't even restore Iraq to the level of stability it had before the war. General Petraeus tells us that the gains of the surge are very fragile and could easily disappear.
George Bush, John McCain and the Republicans want us to reward them with another four years for leaving us four steps backwards from where we started and for having wasted a trillion dollars to do it. How many more steps backwards should we give them the chance to take us?
Q: Sarah Palin has more executive experience than you. You've never made an executive decision in your life. What makes you ready to be President?
A: It's true that we elect Presidents to make decisions. But if previous executive experience led to good decisions then George Bush, after six years as Governor of Texas and eight years as President, ought to be doing expert work by now. Unfortunately he's still making lousy decisions that are going to handicap this country for many years to come.
The key to making good decisions is to first understand the problem you're dealing with. George Bush never bothered to understand what he was looking at, he just wanted to feed his fantasy of being "the decider".
Q: Should the government bail out Fannie Mae and Freddie Mac?
A: This could have been avoided if the Bush Administration had properly regulated those companies over the last eight years. A lot of rich people got richer because George Bush and John McCain looked the other way, and now this bailout kicks the responsibility for this disaster to the next administration. George Bush can claim he's saved the financial system today, but the next president is going to have to find a way to pay for his foolishness.