Comment by Maursault

What you and responders have missed is the 1st Amendment is totally and entirely inapplicable to Twitter. There is a misunderstanding here of the Amendment. It only applies to federal, state, and local government actors. This is a broad category that includes not only lawmakers and elected officials, but also public schools and universities, courts, and police officers. It does not include private citizens, businesses, and organizations. Censorship by the government is unconstitutional. No other entity or group is bound by the 1st Amendment. And this is by the Founders' design, because extending the 1st Amendment to all entities and groups would in fact limit freedom.