In WikiLeaks Probe, Feds Used a Secret Search Warrant to Get Volunteer’s Gmail
This is less objectionable on a procedural basis than many of our current problems. WikiLeaks received classified information, which means someone in the US committed a crime. They went to a judge and got a search warrant based on a an affidavit establishing probable cause of being related to a crime they are investigating. The secret warrant is a little iffy, but far better than secret courts or wholesale collection of "metadata" on everyone.