China holds the keys to North Korean diplomacy

On Tuesday, Chinese President Xi Jinping hosted U.S. Treasury Secretary Jacob Lew. It was the first high-level exchange between the two countries in six months. The atmosphere remains strained over alleged state-sponsored computer hacking and China's mercurial ally, North Korea.

Col. Douglas Macgregor (U.S. Army, retired) discussed the meeting and other topics with Capital Insider.