Well, sure.. i.e. if Ohio's slate becomes "tainted" or challenged or whatever, then Bush is at 266 rather than 286, and is deprived of a majority.
But there's no "turmoil" in that, it just throws it into the House, which is (R) controlled. I don't see any conceivable way that this scenario would alter the outcome.
but Kerry would then go up to 272. right? and you only need 270. right? Oh this is not gonna happen anyways...but just wondered