A recently signed partnership agreement between Moscow and Pyongyang should worry not only the U.S. but also China as it threatens to undermine the stability of the Korean peninsula, the White House said on June 20. Russian President Vladimir Putin and North Korean leader Kim Jong Un signed the pact earlier this week, pledging to provide each other aid if either is attacked. Putin did not rule out that this assistance would include weapons. “It’s to be of concern to any country that cares about maintaining peace and stability not just on the Korean Peninsula, but in the Indo-Pacific,” U.S. Nat…