President Barack Obama and first lady Michelle Obama walk with daughters Malia and Sasha across Lafayette Park to St. John's Episcopal Chuch on Oct. 27, 2013, in Washington, D.C.

If Sasha Obama suffers from "youngest child syndrome," it will likely be dampened in 2016 when the first family turns to her for an important decision.

President Barack Obama said she would be one of the deciding factors in where the family lands after leaving the White House. At that time, she will be a sophomore in high school and the family plans to weigh her opinion heavily before deciding whether to stay in Washington, D.C. or move back to Chicago.

The Obamas have maintained a residence in Hyde Park on Chicago's South Side, where the girls were born, and the home is still considered their home base. Many expected them to return to the city.

"You know we gotta make sure that she's doing well… until she goes off to college,” Obama told ABC's Barbara Walters. “Sasha will have a big say in where we are.”

Malia, the oldest daughter, is now 15 and she will be 18 in 2016.

The president and Michelle Obama discussed life after the White House, among other things, during an interview with Walters that aired Friday on 20/20. With an emphatic confirmation from the first lady, the president said he would not seek another elected office, saying he had run his last campaign.