He can call a conference, but the press is not obliged to show up.
https://variety.com/2017/tv/news/cnn-white-house-press-confe...
And since that in 2017, when they figured they could skip his press conferences, it has becoming more and more normal, if I remember correctly he announced a press conference only some days ago and it was ignored by almost all major media corporations with a few exceptions (Fox for example aired him).
https://qz.com/1503024/2018-was-the-year-the-white-house-pre...
Why would you expect them to come the moment you want them after blasting them as fake news, and kicking them out when you dislike their questions?
I don't think I'm the only one who switches channels whenever that man is on.
Your link says that one agency (CNN) declined to broadcast one press conference. What about all the other statements and speeches? What about all the other media outlets?
This is a genuine question - I do not watch a lot of news. Is there a government owned platform that I don't know about? I just looked into CSPAN a bit and it is a private organization, so couldn't they also just decide to not air things?
edit: I am referring to the claim that "He can call a press conference and communicate with every American within minutes." How?
No one in America has the latter.