https://www.nytimes.com/2017/04/14/us/politics/visitor-log-white-house-trump.html?_r=0

The White House announced Friday that it would cut off public access to visitor logs revealing who is entering the White House complex and which officials they are meeting.

Mike Dubke, the White House communications director, said the visitor logs were being withheld because of “the grave national security risks and privacy concerns of the hundreds of thousands of visitors annually.”

This is relevant to the Pizzagate investigation because it will hinder researchers to establish whether certain "suspects" are entering the WH.

Important question: Does anybody know if the now closed logs also pertain to past visits?