I wonder if this (nationalized 5G network) is actually a feint. I have noticed that Trump sometimes use ‘feints’ by putting out an extreme position, which he “may” have the authority to set, to coerce people to work together who would rather push their individual agendas to the cost of everyone else.
If you have noticed, the US Cellular telecom is partially balkanized. It seems to worse for a short time every time a new standard is developed. Each telecom pushes their own variant.
As it presently stands, there is multiple coverage in some areas while other areas are completely ignored.
Personally, I don’t think it is a good idea – though there may be a way to have it work. It might also allow the gov to spy on everyone.