Last I recall President Bush was riding a carbon-fiber TREK mountainbike. I don't know whether it is a full-suspension or hardtail model or the components he has selected. I'd guess a blend of Shimano and SRAM parts.
~ Blue Jays ~
President Bush bicycling / mountainbiking thread that could be of interest to you. I'd love to see GWB purchase a cool Seven Axiom and get into roadriding as well!
~ Blue Jays ~