Depending on what we consider to be trans rights, the vast majority of them are already protected adequately under the U.S. Constitution. The problem here is deciding whether or not referring to people in a specific way is included in that list of rights - in my estimation it is not, it’s compelled speech. Anyone can “misgender” others regardless of whether they’re trans or not, it’s a fairly common (albeit childish) form of insult. “You punch like a girl” is as old as time, for instance. I don’t see how it’s any different than any other insult, and if it’s used in earnest then it’s an expression of belief that identifying biological sex trumps personal self-identification, both of which would seem protected to me. Regardless of the scenario, I don’t think there is an enumerated right to not have your jimmies rustled - you’re the one in charge of your jimmies. There are legal protections against harassment if an individual contacts you repeatedly against your wishes, and those also protect all citizens regardless of whether they’re trans or not. I was always of the opinion that enumerating rights that only apply to a specific subset of society is counterproductive - rights should apply to everyone equally and encompass everybody. When slavery was outlawed, it wasn’t outlawed based on a specific skin tone, it was outlawed outright, not piecemeal.