It was JFK. The guy was actually an incompetent jerk, but the media made him into a fashion model.
Eisenhower and the Interstate highway system? Nonsense. It’s a bad joke. People drove to work before that, and most commuters get to work without driving much on the Interstate.
Car roofs got lower after men ditched their hats.
Was more about being able to shuffle troops and heavy equipment around the CONUS quickly and efficiently - think pre C5A's - without being dependent on rail which could be bombed. Ike also saw how Hitler had been able to lower unemployment and create an economic demand for the passenger car with his Autobahn which in turn created an economic halo effect.