How John McCain Still Can Win

Obama is in the lead, both nationally and in some very key battleground states. This election is his to lose. But elections can be surprising affairs. Let's ask a question: What combination of factors would need to occur for Obama to lose? And how realistic is that scenario?

Here are some important factors to keep in mind.

1. You can't trust the polls. We have seen too many examples in the past when the polls were misleading. When you have "national" polls purporting to show that Obama has a lead in one poll of 12 points and in another poll of two points, that tells you something is off. So much for the "science" of polling. When I see a poll that tells me they have a margin of error of 3.5%, I double that. A poll with a seven percent margin of error is only good for giving you some indication of general trends, nothing more.

2. Undecided voters. In recent presidential elections, the undecided voters have broken for the Republican candidate....