Today in Florida John McCain spoke blasted his GOP Presidential rivals over immigration, clearly and openly questioning their motives and suggesting that their views were driven by nothing but Presidential politics:

But the choice is between doing something, imperfect but effective and achievable, and doing nothing. I would hope that any candidate for President would not suggest doing nothing. And I would hope they wouldn't play politics for their own interests if the cost of their ambition was to make this problem even harder to solve. To want the office so badly that you would intentionally make our country's problems worse might prove you can read a poll or take a cheap shot, but it hardly demonstrates presidential leadership.

But only three days ago, on Friday, McCain very clearly stated that he saw nothing but good, apolitical motives on the part of immigration bill critics:

"The president, and all of us, feel frustrated sometimes by the criticism and the level of the dialogue," Mr. McCain said. "I respect the views of those who disagree with us. I don’t question anyone’s patriotism or love of this country. I wish we could lift up the level of discourse and dialogue."

Only three days ago, he said he viewed immigration bill critics as acting out of "love of this country." But today, they're suddenly willing to "make our country's problems worse" in service of their Presidential ambitions. What changed?