I am glad there are people in the US who still have a clear head. I can't believe people in the US just arrest people with different views.
An invasion is not going to happen but an attack is possible. How about using ICBM's with conventional warheads?Any scenarios where the CONUS is invaded make little sense. At least in a conventional war. You would need to transport millions of soldiers across either the Pacific or the Atlantic. Logistically it makes no sense. Even if the USA did not have its Navy, with modern satellites, and area denial weapons they can easily prevent something like that from happening.
Perfectly natural activity for China as a near-Arctic state.