Yes but if the primary argument is based around the idea that everyone must have access to these “public channels” because their first amendment rights guarante

Yes but if the primary argument is based around the idea that everyone must have access to these “public channels” because their first amendment rights guarantee them a right to the information from the President and to be part of the conversation then a plausible argument can be made that Twitter, etc. cannot ban anyone from their site, or Facebook for that matter since Trump also uses it as a public forum. Even Nazis get their first amendment rights. Furthermore this opens the door for a President to turn any private space into a “public forum” by using it for official government business. The whole amicus just opens a Pandora’s box and would likely be struck down if the President cared enough to challenge it. It benefits Trump more to let this ruling stand as he attempts to muscle Twitter, Facebook, etc. into changing the hate speech rules they use to suspend conservative accounts.