[notahacker]

US Presidents have had the ability to make false claims based on video of something completely different, create material using actors and/or compromised communications, stage events or use testimony that information has been obtained via secret channels from appointees heading up agencies whose job it is to obtain information via secret channels for a long time now.

If anything, recent events suggests the opposite: deepfakes can't be that much of a game changer when an election candidate doesn't even have to try to manufacture evidence to get half the people who voted for him to believe his most outlandish claims.