Who's to blame for polarizing the nation?

An interesting article here from the Dallas Morning News
The author, Wayne Slater, asks whether the two candidates, both vowing to end the polarization, can do it.

I wonder where the polarization came from...not that the tendencies weren't already there, but G.W. Bush, who lost the popular vote, won the presidency with a supereme court decision that said, stop countring ballots, and then governed like he won every state. Any reasonable person would have realized, I have to tread softly, that the nation is seriously divided and my own presidency is not as legitimate as the past few. Instead, he did the exact opposite, and even with 911, where he had tremendous backing, instead, he polarized the world and the nation..leading to the divisive 2004 election, which Mr. Slater points to as an important event in the polarization of the nation.

If Senator Obama wins, he has to be cautious not to overstep, given that the Dems are likely to increase their numbers in Congress. People are not so much voting for democrats as much as voting against republicans.

If Senator McCain wins, he will have to work with a democrat congress. He gets nothing done if he continues with the polarization and demonization of the other side.