"My grandmother Toot is gravely ill and may not make it to Election Day," says Obama. "But I want to make sure I have time to sit down with her. She's still alert and I don't want to miss that opportunity."
Roberts asks him, if his grandmother doesn't live to see Election Day, what does that mean for Obama?
"My grandmother has been one of the cornerstones of my life -- she's remarkable," he says. "The nice thing is, ever since people found out I've left campaign trail, Toot has received emails, letters, and flowers from total strangers. She's getting deserved recognition at the end of her life."
•Roberts also asks if Obama has any regrets about "spreading the wealth" regarding his proposed tax plan.
•Obama answers, "McCain wants to continue Bush's tax plan which in 2007, he opposed. He doesn't want to give tax cuts to the people I would give them to -- that's a problem. We cannot give tax breaks to the rich instead of the middle class. It would be bad for families and the economy. It would actually prevent the economy from recovering."
•"McCain said you'll say anything to get elected," Roberts says. "What's your response to that?"
•"I'm not interested in doing 'tit for tat' with McCain," answers Obama. "If you compare the quality of our campaign and theirs, we've been consistent and civil and we haven't attacked his character. We get a good grade for that."
When asked what's the first thing he'll do when he gets to Hawaii, Obama says: "I'll give Toot a kiss and hug and then I'll ask what chores I can do around the house."