Who became President of the United States after Lincoln's assassination?

Following Lincoln's assassination in April 1865, Andrew Johnson, who was serving as Vice President at the time, ascended to the presidency. This transition was crucial because Johnson was in a unique position to continue the policies and vision that Lincoln had for the nation during the critical period of Reconstruction after the Civil War.

Johnson's presidency marked a significant shift in the political landscape, especially regarding the approach toward Southern states and the formerly enslaved population. He faced considerable challenges, including opposition from Congress, and his policies ultimately led to his impeachment.

The other figures listed were either not in office at the time or had served before Lincoln. James Buchanan was the president immediately prior to Lincoln, and Ulysses S. Grant succeeded Johnson later on in 1869. Benjamin Harrison did not become president until the late 19th century, long after Johnson's presidency. Hence, Johnson’s immediate succession after Lincoln’s assassination is a key historical event in understanding the trajectory of U.S. governance during Reconstruction.