Having a national social media would have the side benefit of allowing a better identity system than social security numbers which are a travesty. I have to share my social security number with many people, but also somehow keep it safe? Instead, I should have a public and private key pair, and this could be associated with my National Social Media account for a single identity, and sign messages with my private key if I need to apply for a loan, or a lease, or whatever.
The National Social Media account could enshrine the same protections afforded by the US constitution - free speech, you cannot be censored top down, only by people blocking you. The government cannot spy on your usage patterns or edit your messages, and so on.
If Trump were to get such a thing created, and it worked reasonably well, and he started using it exclusively instead of Twitter, I think it would gain a lot of traction. I know I would try it out.