I watched the movie and feel like I misheard or missed completely.
When Hux comes in and sees Snoke dead and Ren on the floor, after he gets up Hux shouts at him and said our supreme leader is dead. The bit I missed was what Kylo says, because afterwards Hux says while being choked "long live the supreme leader", I thought Kylo repeats "the supreme leader is dead".
So why would that cause Hux say that as from what I can see he is now being
subservient to Kylo and accept him as the new supreme leader.
Surely something else should be said?