'O Captain! My Captain!' mourns the death of which US president?

“O Captain! My Captain!” mourns the death of Abraham Lincoln. Walt Whitman wrote the poem in 1865, shortly after Lincoln was assassinated at Ford’s Theatre in Washington, D.C., on April 14 of that year.

The poem uses an extended metaphor: the “Captain” represents Lincoln, the ship represents the United States, and the difficult voyage represents the American Civil War. The ship has reached port and the Union has effectively survived the conflict, but the captain lies dead on the deck. That contrast between public victory and private grief gives the poem its emotional force.

Whitman wrote several poems about Lincoln, including “When Lilacs Last in the Dooryard Bloom’d.” “O Captain! My Captain!” became his most popular poem during his lifetime and was widely recited and anthologized. Readers sometimes confuse the president in the poem with another wartime leader, but the historical references clearly point to Lincoln and the Civil War.