President Barack Obama and First Lady Michelle Obama
President Obama says his wife and two daughters are the people who make it possible for him to deal with the pressures of being president.
Watch the Obamas share their favorite family moments since moving into the White House
"When I come home, no matter what I'm dealing with, I know that I've got people there who not only do I love, but whose company I just enjoy and who will bring me down to the level of basic humanity and humor. They will knock you down a peg and make sure that I'm not taking myself too seriously, even if I'm taking the work seriously," he says. "Not only has [Mrs. Obama] been a great first lady, but she is just my rock, and I count on her in so many ways every single day."