Identify which 3 nations you think are the greatest threat to America's peace and security

The three nations that are the greatest threat to America's peace and security at the present are:

China; China has become a global force in the last decades, and it continues to stride forward in every field, including the military power. It has become the biggest threat of the US in every way, and they also have lots of tensions and disputes between each other, which might lead to a conflict between two global powers, and the Chinese are in a position to take anyone head to head at the moment.

Russia; It is the traditional enemy of the US, and slowly but surely it has risen like a phoenix from the ashes, and became a global power once more. There always seems to be a reason a war between the two countries, and the Russians are having at disposal weapons with which no one wants to face.

North Korea; Even though it is far away from being a global power, and it can not win a war with the US, North Korea is a big threat because of the weapons that it has at disposal and the ones it develops, as well as the pure hatred towards the US, and the unpredictability of the North Korea leader, Kim Jong Un.