What would they take back?

Asked what they would have done differently, Sen. Clinton said she would take back her vote supporting the war in Iraq. "I've said that many times," she said.

Sen. Obama said he regrets not taking action when he first arrived in the U.S. Senate and Congress got involved in the case about removing feeding tubes from Terry Schiavo in Florida. "That's an example of when inaction can be as costly as action,'' he said.