A little history… And a recommendation, read “Killing Lincoln” By Bill O’Reilly. It is a fantastic book… Get it at Amazon http://www.amazon.com/Killing-Lincoln-Shocking-Assassination-Changed/dp/0805093079
On April 15, 1865, President Abraham Lincoln died from his assassin’s wounds. But if John Wilkes Booth’s plot were entirely successful, a little-known senator may have been thrust into the White House.
Booth’s full plot included killing Lincoln, Vice President Andrew Johnson, and Secretary of State William Seward. General Ulysses Grant was another possible target. But only two attacks took place on April 14, 1865, with Seward surviving an assassination attempt and Lincoln suffering from Booth’s single gunshot.
via The forgotten man who almost became president after Lincoln – Yahoo News.