This is the first time that DC's day to day policing has been federalized. Although the President can arbitrarily extend the action for up to 30 days, after that it would have to be extended via passing a new law. As there is no specific crime emergency going on, the action will likely resolve within 30 days as a media stunt, or be preserved indefinitely as a permanent expansion of athoritarian power.

Feel free to ask clarifying questions in the comments. I intend to resolve Yes if the takeover is preserved past 30 days by any means, as the title implies, even if it is legally disputed.