The President between John and Richard was Lyndon Johnson, who served as the 36th President of the United States from 1963 to 1969. He was a Democrat from Texas and was the first president to be sworn in on Air Force One. He is best known for his 'Great Society' program, which aimed to reduce poverty and racial injustice. He also escalated the Vietnam War, which ultimately led to his decision not to seek re-election in 1968.