Moscow or Bejing can't possibly be interested in a civil war in the USA, a nuclear state. They might want the USA to become poor and dependent, but the US government needs no help in this department. If the trend continues, US competitors will win by default, by doing nothing. In the end, IMO, Moscow and Bejing will help the USA to stay in one piece - just like the USA helps Iraq and Afghanistan. Failed countries are always bad news; a failed country with nuclear weapons is unacceptable.
Not if they (the "Ex" USSR, China, and their third world dictator pals) want to come in here and "Stabilize" it...