Well, there's a significant middle ground. Trump has no clue. But, those speaking on behalf of the intelligence agencies have a dog in the fight, too.
The only intelligence agencies I've seen that would directly comment have said that there is insufficient proof to make the determination.
(And, I'll say again, why are 17 intelligence agencies even involved?)
Do we even have 17 intelligence agencies? Based on experience with it, I've never observed a shred of intelligence at DHS