Republican presidential hopeful John McCain mocked Democrat Barack Obama on Wednesday for saying he would take action as president "if al-Qaida is forming a base in Iraq."

"When you examine that statement, it's pretty remarkable," McCain told a crowd in Tyler, Texas.

"I have some news. Al-Qaida is in Iraq. It's called `al-Qaida in Iraq,'" McCain said, drawing laughter at Obama's expense.

Obama responded quickly, hitting back hard:

Mr. Obama, in Columbus, responded soon after. "I have some news...