President Trump's foreign policy challenges

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President Trump's foreign policy is being tested with China, after the president's tweet threatening an increase in tariffs stunned investors who've been optimistic about a potential trade deal, and in North Korea, where President Trump is standing by Kim Jong Un despite multiple launches of guided munitions into the ocean this weekend. Peter Baker, Chief White House Correspondent at the New York Times, and Victor Cha, a former Director of Asian Affairs in President Bush's National Security Council, join Andrea Mitchell to discuss.