Yes, it's good to set our expectations low, but just remember, Bush is in charge of Federal Election enforcement. He damned well didn't let vote fraud happen in Ohio during his 2004 election, and he damned well won't let it happen while he's still in charge this November.
The Feds, Team McCain and the RNC are prepared for the shenanigans in the Battleground states this year.
IIRC, the same didn’t apply to WA, WI, and PA. Seems plenty of vote fraud occurred in these states.