In 2004, Bush crushed Kerry in Utah - the most reliably red state - by 71% to 26%. Utah will probably always be Republican until the Rapture, but it's worth noting that McCain leads Obama there by 19%.
A 19% lead in Utah is pretty bad for a Republican presidential candidate - especially one from the west.
Bush won Utah in 2000 by 40%
Dole won Utah in 1996 by 21%