So the intelligence community's conclusion that the GRU hacked the RNC, and the Republican administration CIA director's endorsement of that report doesn't hold

So the intelligence community's conclusion that the GRU hacked the RNC, and the Republican administration CIA director's endorsement of that report doesn't hold any weight whatsoever? When the civil servants and the political appointees of two administrations from different parties all three agree that the DNC and RNC were both hacked and exactly one set of data was leaked, does that carry no weight at all? If it wasn't true, why isn't the RNC chair out there insisting they weren't hacked?