"I think it's the truth, the fact that he would have not pursued any of this had I really, really put my foot down," she said. "It made it really hard to be the person that would stand in the way of someone else's dreams, and the possibilities of his leadership. And I definitely didn't want to be in that position. I think I made the right call."
Between greeting world leaders and raising tweens, Malia and Sasha, in the national spotlight, Obama's scheduled is packed. But even she has her "lazy days." The first lady said her guilty pleasures are often "food based," or are watching "really bad TV" with the family's Portuguese water dog, Bo.
"I sit with Bo, who usually climbs up on my lap. He thinks he's a lap dog," she said. "He'll cozy up with me, and I'm just clicking through mindless shows. A lot of, you know, shows about food and design, and all that good stuff. And it's just quiet, and I'm not thinking about anything for that second -- not about the kids, not about my husband, not about my schedule. If I get an hour of that during the course of a week, it feels like heaven."
Obama gushed about Bo, who instantly became the apple of the family's eye.
"Bo is my baby, he's our son. He's wonderful. He's growing," she said. "It's like I'm a mother. You ask about my kid, I'm gone."
But the reality of life at the White House has not yet set in for the first lady, who said she sometimes walks through the grand, historic rooms and has to pinch herself.
"There are moments when -- especially at night when it's quiet or you're driving up to the White House at night and the white lights are shining on … this beautiful home and you pull up to it, and somebody opens the door and says, 'Welcome home' -- those are the times when you think, 'Really? Wow. OK, here we go,'" she said
Barack Obama was dubbed Walters' Most Fascinating Person of 2008.