Nope it started back in the spring and summer with Covid. They emptied the shelves then. Not that it won't continue with Biden, but it has been going on since last year. I have been after 20 gauge pheasant loads since last September.It may have something to do with a Democratic President. While I agree with your assessment that its been going on before he took office, there's usually several events that fuel a surge in ammo/gun demand.
Democratic leadership is one of them. A mass shooting event is another. You can add civil unrest and a pandemic to that list now.