"We're going to get a little tougher, " a senior Republican operative said, requesting anonymity because he wasn't authorized to discuss strategy.

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The U.S. State Department hasn't been contacted about travel to North Korea by this group, a senior administration official said, requesting anonymity to comment before any trip had been made public.

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The Justice official, requesting anonymity, did not indicate how quickly the Justice Department would provide a formal response to Issa, but it appears likely Holder or Deputy Attorney General James Cole will respond in a letter to Issa within the next day or two.

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