In remarkable footage captured by an onlooker hoping to get a glimpse of the President, a deafening screech is heard before the crash. The car is then seen to smash into a freeway divider along Interstate 85 in Opelika, Alabama. Moments later the presidential motorcade drives past the battered vehicle.
Despite the shocking crash, the motorcade did not stop or even slow down.
Local reports suggested Trump had been on his way to look at tornado damage in the area on Friday.
CNN reported that the Alabama Highway Patrol said an investigation by the Opelika Police Department was under way.
No comment was given by that department.
A Secret Service official said the driver had been spoken but no further action would be taken.
Earlier, Trump tweeted about the tornados which ravaged Alabama.
He wrote: “Federal Emergency Management Agency has been told directly by me to give the A Plus treatment to the Great State of Alabama and the wonderful people who have been so devastated by the tornados.”
On Sunday, flags were flown at half-mast in honour of the 23 people killed during the tornados.
The deceased were aged between six and 89 years old.