[dragonwriter]

> Twitter is a monopoly.

In what market? What is the evidence of non-substitution/pricing power?

> When the only way for government officials to relay messages to their constituents is through a private platform such as Twitter

It’s...not the only way.

> it ceases to have the same privilege as a private corporation

First Amendment rights of private parties are not privileges.

> It is a de facto public square.

It is neither a de facto nor de jure public square.

> This is not up for debate.

Saying “This is not up for debate“ does not make your bare assertion into an actually unquestionable position.