The memo focuses in part on the Foreign Intelligence Surveillance Act (FISA) warrants that authorized the surveillance of former Trump campaign foreign policy adviser Carter Page.

Federal law enforcement sources as well as congressional sources briefed on the intelligence during the 2016 campaign have said that well before Page joined the Trump campaign, there were concerns about his contacts with Russian spies.

The memo looks to connect information gathered for the Trump “dossier” alleging connections between Donald Trump and Russia, to those FISA warrants.