Because Coats probably has a weakness that can be exploited and therefore slow roll the declas.
He is very anti Russia. Pretty pro war. Probably the reason for the instances of shaky intel we have received. Syria chemical attacks, Iran aggression, et cetera.
>Sen. John McCain (R-Ariz.), praised the selection of Coats for the national intelligence post. "It'll be great, he's one of my favorite people," McCain said. "I also like see these old geezers given another chance."