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 ...

NASA has put men on the moon, but it couldn't stick the landing when it came to designing a logo that is as cool as its missions ... as an arc that cuts the letters off from the baseline ...