4. Lyndon B. Johnson, Amphicar
It’s easy to see why this rare German car built in the 1960s was a favorite of Johnson’s. He would pick up visitors to his Stonewall, Texas, ranch in the bright blue convertible and pretend the brakes had gone out as he approached a lake on the property. Johnson owned an interesting array of cars, including a Jolly 500 Ghia made by Fiat along with his more recognizable Lincoln Continental.