2.4 percent is the chance of a tie 269-269
The tie is going to the House of Representatives, so it is not really a tie, but GWB win. I tend to believe that they must be illegally pocketing 2.4%.
And of course, if every elector voted for himself or herself, there would be a 538-way tie, one vote each. How would the House resolve that? Mr. Madison, you didn't provide for all the possible scenarios!