They don't tell him what to do. (They need him more than he needs them, so he can do as he pleases. It wouldn't be that way for, say, Lee Zeldin in New York State, who relies heavily on party infrastructure.) I actually think he's trying to kick-start compromise. Many Republicans I've talked to recently to tend to think 15 weeks is a reasonable compromise. So I think that's where he might be headed. But to the extent (as I've read here; not anywhere else) the 15-week marker is a federal maximum that can be lowered in other states, this thing is both doomed and bad politics.