I think you mean an EMP here. That would generate a massive nuke exchange where China would be destroyed.
but when push comes to shove what will the rank and file do?
Pretty big tar brush, the 'rank and file' would close with and destroy the enemy just like they did elsewhwere. Would their resolve be lessened fighting on US soil against an invader?
The problem for the invaders is a log chain. Even with a source of supply in Canada/Mexico that is a long road to protect. Coming by ship they better be great swimmers. They would be under airpower the whole way, this is a pipe dream of the left. Nothing like blue helmets to get the fence sitter off the fence and into the field.
PTrump retweeted that video of the lion and the hyenas the other day. IF they’re planning a hyena/jackal style attack then one would bloody us and the others attack from behind. Look for a thrust through Mexico.
Recall from that 2005 Chinese white paper/speech that they want to see us Forded up without getting slagged themselves. Given they consider troop assets as expendable materials, resupply might not be a big issue, just get enough in on the first covert wave to muck up the place, maybe use the chaos to release a more potent biological.
They did conclude that they could eat up to 600-800 million casualties and be good with it as long as the party survived...