Trefousse states that Johnson wanted to "induce Lincoln not to be too lenient with traitors"; Gordon-Reed agrees.[111][112]
That night, President Lincoln was shot and mortally wounded at Ford's Theatre by John Wilkes Booth, a Confederate sympathizer. The shooting of the President was part of a conspiracy to assassinate Lincoln, Johnson, and Seward the same night. Seward barely survived his wounds, while Johnson escaped attack as his would-be assassin, George Atzerodt, got drunk instead of killing the vice president. Leonard J. Farwell, a fellow boarder at the Kirkwood House, awoke Johnson with news of Lincoln's shooting. Johnson rushed to the President's deathbed, where he remained a short time, on his return promising, "They shall suffer for this. They shall suffer for this."[113] Lincoln died at 7:22 am the next morning; Johnson's swearing-in occurred between 10 and 11 am with Chief Justice Salmon P. Chase presiding in the presence of most of the Cabinet. Johnson's demeanor was described by the newspapers as "solemn and dignified".[114] Some Cabinet members had last seen Johnson, apparently drunk, at the inauguration.