"It's not an easy decision, and especially because I support a robust system of public financing of elections"

Obama flips on his pledge on public financing for the general election.

But listing the Iraq war, healthcare, education and the economy as defining issues for November's election, Obama said: "This is our moment and our country is depending on us.

"So join me, and declare your independence from this broken system and let's build the first general election campaign that's truly funded by the American people."

With all due respect sir, you flipped on this. There's no getting around it. You flipped. I don't want to make any broad conclusions based on this, but these sorts of things may give some the impression that you have a problem keeping your word:

"Today, Barack Obama has revealed himself to be just another typical politician who will do and say whatever is most expedient for Barack Obama," McCain's communications director Jill Hazelbaker said.

"The true test of a candidate for president is whether he will stand on principle and keep his word to the American people," she said.

"Barack Obama has failed that test today, and his reversal of his promise to participate in the public finance system undermines his call for a new type of politics."

Like I said, I'm not prepared to condemn Obama as a phony, but when you set out to be a new kind of politician, these sorts of things don't help that image, and do more damage than they would otherwise. That's all I'm saying.