The Ultimate Dark Horse - Nobody is challenging Obama in the primaries--and doing surprisingly well.WSJ.com

The Ultimate Dark Horse - WSJ.com: "There are only seven sitting presidents who have ever received less than 60 percent of the vote in any primary: Taft in '12; Coolidge, '24; Hoover, '32; LBJ, '68; Ford '76; Carter, '80; and Bush '92. All of these presidents, with the exception of Coolidge, were not re-elected."