https://techcrunch.com/2019/11/15/twitter-makes-its-political-ad-ban-official/

The ban on political ads announced by Twitter two weeks ago has come into effect, and the rules are surprisingly simple — perhaps too simple. No political content as they define it may be promoted; Candidates, parties, governments or officials, PACs, and certain political nonprofit groups are banned from promoting content altogether.

The idea intended to be made manifest in these policies is that “political message reach should be earned, not bought,” as the company puts it. It’s hard to argue with that (but Facebook will anyway). The new rules apply globally and to all ad types.