[8ytecoder]

I'd imagine they'd just change[1] the username of the current account and create a new one with @POTUS handle.

[1] https://support.twitter.com/articles/14609

[GuiA]

If they do that, then the new POTUS account will start at 0 followers (unless they have a special agreement with Twitter).

[favorited]

I'd imagine they have a special agreement with Twitter anyway, at least to keep someone from programmatically grabbing @POTUS as soon as a script realized that @POTUS44 had been created.

[privong]

> If they do that, then the new POTUS account will start at 0 followers (unless they have a special agreement with Twitter).

They must have made some sort of arrangement. The article states:

The account will retain its more than 11 million followers, but start with no tweets on the timeline.

[cmdrfred]

They just do a password reset on a Twitter admin account and have the NSA forward them the email.