I think President Lyndon B. Johnson decided not to run for reelection because his unpopular choices in the Vietnam War affected his chances too greatly. Johnson believed North Vietnam taking South Vietnam would lead to the spread of communism and cause a domino effect. His solution was to escalate the war in hopes pressure was key to stopping North Vietnam. He also increased the commitment of troops to 500,000 by 1968, but his escalation only led to more casualties. However, Johnson said his decision not to run was because he wanted to spend more time with his grandchildren.
