Jindal's "J," which has been used as the logo for ... using just a letter or two is in. The most memorable letter-as-logo is Barack Obama's "O," but before him, Hubert H. Humphrey (D) used ...

Have you noticed the strange, inexplicable, seemingly random appearance of the letter J in some e-mail messages? Usually it crops up at the end of sentences, though sometimes it lands smack in the ...