Buy them now.
I wouldn't be surprised if Patel starts quietly adding registered Democrats to NICS (federal background check database). Even worse would be them making Dems get a "delay" response instead of a "deny" or "proceed".
A delay is supposed to be used when more research is required, and happens for things like having a common name (e.g. "John Smith" or "Jose Sanchez"). When you get a NICS delay, the gun can't be sold, at that time. You can sell a gun on a delay after 72 hours if it doesn'tcome back as a deny, but most chains have a policy to wait for a proceed. The thing is, lots of times the proceed takes more than 30 days, at which point the background check is invalid. They're only good for 30 days from the initial request, not the response.
Why is a delay worse than a deny? You can't appeal a delay or research why it happened. Since you aren't actually on the prohibited persons list, you can't be removed from it.