@stux I'm wondering if it's not real. There is nothing about this on joebiden.com, or on the official Whitehouse site. Also not on the @potus account.
It seems unlikely that the only place this would be announced would be on Twitter via a jpeg without proper alt text.
It's entirely possible the account is compromised especially considering who owns the platform.
I won't believe it until I hear it from a Whitehouse spokesperson.