Gotham is widely known as the “Obama typeface”, but it was a beefed up and clipped Requiem that accompanied the iconic ‘O’ logo for most of the 2008 campaign.
The logo, credited to Sol Sender of Sender LLC was supplemented with typography by John Slabyk and Scott Thomas. I believe Thomas was the one who selected and modified Requiem for the “Obama ’08” type. Someone correct me if I’m wrong.