CNN

McCain hopes to win over undecided voters tonight.

The CNN poll released today showed a dramatic decrease in undecided voters. In fact in the key battleground states of Florida, Colorado and Virginia, John McCain could get every undecided voter left and still not have enough to win the campaign.

This is the key turning point in the campaign.

It is much harder to change people's minds than to convince them to move from the undecided block.

That is what makes John McCain's task so difficult tonight. He has to use the issues that have brought people to the Obama camp – namely the economy – and convince them that the decision they have made about who helps them more in these troubled times, is the wrong decision.

All the talk about McCain "taking it to Obama" on Bill Ayers or his past associations, it seems pretty irrelevant to the real challenge at hand. Can John McCain convince people that they are wrong in their judgements?

What are his choices tonight?

-Personal character attacks?
-Social issues like abortion and same sex marriage – the so-called values retread?
-Create fear of a Democratic controlled Washington within Congress and the White House?
-Yet another economic plan?

Lots of choices, none of them sure winners particulalry when Barack Obama has shown a steady hand on all of these issues.

Obama: I don't understand why we invaded a country that had nothing to do with 9/11.

Obama just said "Senator McCain is right, I don't understand, I don't understand why we invaded a country that had nothing to do with 9/11. And we are still there ignoring the real problems elsewhere and spending money we don’t have.” BINGO.

Obama is owning this foreign policy discussion.