Show me where any of the other Intelligence agencies support the CIA conclusion, without evidence, that Russia was interfering in the election and supporting Trump. Not that the Russians did some hacking but that the actual Russian Government supported Trump and actively interfered with the election. 

Almost every agency agrees that entities that have ties to the Russian government were probably involved in the hacking of John Podesta's email account but other than the CIA, no agency has attributed the hacking directly to Putin and the Russian government. Julian Assange has also repeatedly said that the hacked emails did NOT come from the Russian Government. Assange is not a much loved figure but no one has been able to find anything he has said or released to be in any way false. Maybe embarrassing to a whole lot of people, republican and democrat, but nothing has been found to be false.

The Obama administration announced that there was no hack or interference with the election.