Well, you can make a deal with each administration. It's probably in the best interest of any DoJ, Democrat or Republican, to be able to access data unencrypted. So these deals probably* carry over each time the administration changes hands.

* With the recent investigation into Apple [0] by the DoJ, I don't see this deal continuing for far longer. Unless the investigation is just for show.

[0]: https://www.businessinsider.com/biden-team-continue-scrutini...