Yahoo News repeats the myth here:
McCain lost to Barack Obama in 2008 in a race that was not close.
McCain's loss was actually very narrow, and attributable to two interrelated factors, as here:
1) he lost nine formerly Red states which went to Bush by just 1.38 million votes; that's 1.04 percent of 131.5 million votes cast; had these gone his way, he'd be president today, not Obama;
2) in those same states, Obama outperformed Kerry and McCain underperformed Bush by a margin of over 3.2 million votes; Obama turned out his vote in those states, McCain turned his away.
Republicans and independents won't vote like that again . . . unless of course Republicans buy up all the stupid pills at Walgreens and make McCain their candidate again.