This is block buster news. The DOJ and FBI are stonewalling in-numerable FOIA requests (which they are required by law to provide), subpoenaes from Congress, and document production demands from Congress.
Neither the DOJ nor FBI caused the gag order to be lifted - in fact, they both kept the gag order in place.
It took direct action from President Trump to override them on this.
TIME TO DRAIN THE FREAKING SWAMP.
Uranium One probe: Order to lift 'gag' on Russia informant came from Trump, source says
http://www.foxnews.com/politics/2017/10/26/uranium-one-probe-order-to-lift-gag-on-russia-informant-came-from-trump-source-says.html