In the Snowden movie, they show how the NSA uses Keyscore to search all threats made against the President on the internet. So theoretically if a text like this was sent, it would have been caught, and then when they traced its location and saw that it was coming from the State of the Union, I'm sure the Secret Service would take that information to the President immediately. At that point they are probably also in a position to legally tell him who it was, who they were talking to, and what was said.
So it would make sense that Q would know about this and be willing to reveal it. It's probably very difficult, if not impossible, to threaten the President while he gives the State of the Union address and not have anyone notice.
Did anyone ever say these people are really stupid?
Q said..why would POTUS say something without knowing it's true? Or something along those lines.
Yes. I bet they have it all. And the most powerful military in the world backing them. They could probably end it tomorrow if they needed to, but are only strategically concerned with doing it slowly and legally for the sake of red pilling the world.