actually, past, future, and present are relative. time dilation is exaggerated ofer lond distances. say you run ten miles an hour. while running, your present contains the present of a region of the universe 150 years future. cool, huh? well, too bad you wouldn't know what would happen at that time, for that region of space is 10 billion light years away and it would take ten billion years for you to know what happened. similarly, if you ran in the opposite direction, your present would contain the present of 150 ago of the same region.
as for the lincoln thing, he WAS told not to go.