Jonathan Hoefler and Tobias Frere-Jones, the New York-based fontographers behind the modernist Gotham font being used widely by the Obama campaign, slam the other candidates' typographic choices:
Hillary's snooze of a serif [seen here] might have come off a heart-healthy cereal box, or a mildly embarrassing over-the-counter ointment; if you're feeling generous you might associate it with a Board of Ed circular, or an obscure academic journal. But Senator McCain's typeface [seen here] is positively mystifying: after three decades signifying a very down-market notion of luxe, this particular sans serif has settled into being the font of choice for the hygiene aisle.
But when it comes to Gotham, H&F-J's sales copy reads like a pitch for Obama:
Friendly without being folksy, confident without being aloof, [its] many moods run from hip to nostalgic to brash to eloquent.
Related: A post on Gotham from the film blog for Helvetica that's actually titled "A Font We Can Believe In." (Thx diggersf for the photo and Lindsey F. for the tip.)