President Barack Obama called out Fox News' Chief White House Correspondent Ed Henry Thursday as a "spokesperson for Mitt Romney."

During a joint news conference with South Korean President Lee Myung-bak, the president allowed Henry to asked the first question.

"President Obama, I wanted to get your first reaction to the Iranian terror plot," Henry said. "Your secretary of state called it a dangerous escalation. What specific steps will you take to hold Iran accountable? Especially when Mitt Romney charged last week -- quote -- 'If you do not want America to be the strongest nation on Earth, I am not your president. You have that president today.'"

"Well, I didn't know that you were the spokesperson for Mitt Romney," the president replied with a quick smile.

"With respect to how we respond, our first step is to make sure that we prosecute those individuals that have been named in the indictment and I will leave to the attorney General the task of describing how that will proceed. The second thing that we're going to continue to do is to apply the toughest sanctions and continue to mobilize the international community to make sure that Iran is further and further isolated and pays a price for this kind of behavior."

Watch this video from CNN's Newsroom, broadcast Oct. 13, 2011.

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