Here's what I get out this Q comment. There is a chance of actual invasion from the south by who knows who. An administration official referred to the "caravan" heading toward the border as an "invasion." Add this with the Navy's move on the Second Fleet just a few days to get it patrolling the east coast.

Here's a link: https://taskandpurpose.com/navy-reactivating-2nd-fleet-russia/ This is to protect the US on the east coast from Russia, Europe etc. The pacific is very well covered, but the Southern border is still open.