1. Pass a law (itself very shady) to force major changes or dissolution of the service at the very beginning of the next president's term.
2. If a Democratic president follows the law, blame them for "killing TikTok". If Republican becomes President, sit back and allow them to break the law indefinitely.
3. Republican president illegally [0] takes the time to arrange things so that the service becomes a right-wing outlet.
[0] https://bhr.stern.nyu.edu/quick-take/trump-is-defying-the-la...