According to the man himself, he also experienced some paranormal activity. On the night of his first election, he took a moment to rest on his couch one evening. While lying there, he happened to glance in a mirror and saw his own visage - except that he had two faces.
A second Lincoln, pale and ghostly, was looking at him from the mirror, right next to his own face. Startled, he rose from the couch and the doppelganger (German for “double-walker”, paranormal duplicates of a real person) disappeared. He sat back down, only to see it again.
Lincoln was startled, but his wife Mary was downright terrified. She was convinced that the doppelganger was bad news - a certain sign that Lincoln would be re-elected on a second term possibly because two Lincolns equals two terms, but wouldn't survive it because the second Lincoln looked deathly.
Lincoln went on to repeat the couch experiment every once in a while. He did manage to glimpse the doppelganger one more time, but after that it stopped appearing.
Maybe it had delivered its message, as Lincoln indeed didn't make it through his second term.