Louisville MetroSafe spokeswoman Jody Duncan says a man called 911 about 5:15 p.m. Thursday to report that his wife was in labor and that traffic wasn't moving.
The interstate had shut down and traffic was bottlenecked as the president's motorcade made its way from the airport to downtown Louisville.
By the time emergency crews arrived 12 minutes later, the boy had been born.
The mother and child are doing well at a hospital.
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