Around March/April this year, I actually did download the TensorFlow toolkit for face transfer that was used by /r/deepfakes people and tested it out (there were samples of photos of politicians included); the results were, at best, worse that I could do in 2 minutes in Gimp. Maybe they could get better if I had an expensive GPU farm at my disposal, but I'm pretty doubtful - given that the news died down pretty quickly, and no reasonable-quality faked pictures or videos were reported ever since.