No he is not. Calling them a threat to democracy for spewing lies isn’t culling their right to do so. But slander is a legal matter.
Go after them in court then. Like he did with ABC. I’m all for it. It’s the lack of accountability that has allowed free speech to get out of control. People should be allowed to say almost anything as long as they are held to account for it. Can’t yell fire in a theatre or incite violence for example. Hold them accountable. But when I say I support more free speech than somebody else and the response is to shut up and go away I think they just proved my point.