When it comes to campaign design, 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 a triple "H" in 1968 ...

In a crowded race without a definitive early frontrunner ... and many candidates chose name logos as opposed to letters or symbols. Interestingly, the only two candidates to use single-letter ...