This is an amatuer Deep Fake using Jim Carrey as the base movement. Just imagine what the government could pull off using this same technique at a higher level along with an algorithm to modulate his voice in real time.
https://www.youtube.com/watch?v=ryneJkgodnw

Here's an example of a voice algorithm that is 2 years old. The AI learning and output has gotten faster and more accurate since then.
https://www.youtube.com/watch?v=VnFC-s2nOtI