Presidents and First Ladies Trivia

[RJNorton]

An American President attended a performance at Ford's Theatre. Afterwards he took the stage. He told the audience of the events of April 14, 1865. He said, "Ford's Theatre is a theater set apart...a kind of shrine - one of the rare buildings which put us in touch with the past." He continued and said Abraham Lincoln "loved the theater and nothing would have pleased him more than the performances on this stage."

Which President was this?