Question

president lyndon b. johnson
decided not to run in the 1964 election.
won the 1964 election by a narrow margin.
won the 1964 election by a wide margin.
lost the 1964 election by a narrow margin.

Explanation:

Lyndon B. Johnson, who took office after JFK's assassination, ran in the 1964 U.S. presidential election against Barry Goldwater. He secured a landslide victory, winning by a large margin in both the popular and electoral vote.

Answer:

won the 1964 election by a wide margin.