Who is the next President in this list? (Warning: This relies on some very specific information that many of you are not aware of, so don't spend too long on it. However, that piece of information relates to something discussed on here by one of my co-bloggers three weeks ago.) (Hint: I am referring to the actual U.S. Presidents, not people with the same names as them, not aircraft carriers, not elementary schools in Nebraska — though that would be a good one — or anything else.)

• James Madison

• Martin Van Buren

• James Buchanan

• Abraham Lincoln

• Benjamin Harrison

• _______________

If you get it, please post the name of the missing President, but hold off on an explanation.

UPDATE: Another hint below.