"This landed in the president's lap," Kelly told Fox News. "We've kicked the can down the road. We have to deal with this guy [North Korean leader Kim Jong Un]. He cannot have a deliverable atomic weapon which can reach the United States. It just cannot be."
"There are open channels but I would prefer not to comment," Kelly said. "There are a lot of people trying to help out here."
Kelly also refused to say whether President Donald Trump had spoken directly to North Korean leader Kim Jong Un.
The Wall Street Journal reported last week that Trump told it he "probably" had a "very good relationship" with Kim. He later corrected the story saying he "would have a good relationship."