"I've got two sons who very, very well, before the next election, at least one of them, may have his degree and the other would be just a year out," Walker told ABC News' Jon Karl.
"Part of it was I wanted to make sure they went through and got what they needed," he said.
Walker -- in Iowa to attend GOP Iowa Sen. Jon Ernst's "Roast and Ride" event -- left Marquette University without a degree more than two decades ago. According to Fusion, President Harry Truman was the last U.S. president who did not have a college degree.
During the interview, Walker acknowledged the difficulty of finishing his degree while considering a presidential bid.