Can you elaborate? I'm not doubting you -- I'd just like to have that specific info on-hand for liberal smackdown purposes. Thanks.
Read this guy:
http://www.computerhealth.org/ebook/5blkpres.htm
(It does help that he is Black!)
Jefferson, Jackson, Lincoln, Harding, Coolidge.
Maybe the author is wrong on one or two, but there is evidence to support him on all 5.