Meanwhile, the top intelligence oversight committee itself (Office of the Director of National Intelligence (ODNI)) is not endorsing the CIA analysis:

"ODNI is not arguing that the agency (CIA) is wrong, only that they can't prove intent," said one of the three U.S. officials. "Of course they can't, absent agents in on the decision-making in Moscow."

The Federal Bureau of Investigation, whose evidentiary standards require it to make cases that can stand up in court, declined to accept the CIA's analysis - a deductive assessment of the available intelligence - for the same reason, the three officials said."

So, It shows that the US Intelligence community itself, does not share similar positions.

So Trump has reason not to believe the CIA.

http://ca.reuters.com/article/topNews/idCAKBN14204E