https://heatst.com/world/exclusive-fbi-granted-fisa-warrant-covering-trump-camps-ties-to-russia/
Two separate sources with links to the counter-intelligence community have confirmed to Heat Street that the FBI sought, and was granted, a FISA court warrant in October, giving counter-intelligence permission to examine the activities of U.S. persons in Donald Trumps campaign with ties to Russia
https://article.wn.com/view/2017/01/11/Guardian_FBI_applied_for_FISA_warrant_for_four_members_of_Te/
The Guardian has learned that the FBI applied for a warrant from the foreign intelligence surveillance (Fisa) court over the summer in order to monitor four members of the Trump team suspected of irregular contacts with Russian
http://www.mcclatchydc.com/news/politics-government/article127231799.html#storylink=cpy
The FBI and five other law enforcement and intelligence agencies have collaborated for months in an investigation into Russian attempts to influence the November election, including whether money from the Kremlin covertly aided President-elect Donald Trump, two people familiar with the matter said.
The agencies involved in the inquiry are the FBI, the CIA, the National Security Agency, the Justice Department, the Treasury Departments Financial Crimes Enforcement Network and representatives of the director of national intelligence, the sources said.
https://www.nytimes.com/2017/01/19/us/politics/trump-russia-associates-investigation.html
The F.B.I. is leading the investigations, aided by the National Security Agency, the C.I.A. and the Treasury Departments financial crimes unit. The investigators have accelerated their efforts in recent weeks but have found no conclusive evidence of wrongdoing, the officials said. One official said intelligence reports based on some of the wiretapped communications had been provided to the White House.
https://www.nytimes.com/2017/01/12/us/politics/nsa-gets-more-latitude-to-share-intercepted-communications.html
WASHINGTON In its final days, the Obama administration has expanded the power of the National Security Agency to share globally intercepted personal communications with the governments 16 other intelligence agencies before applying privacy protections.
WASHINGTON In the Obama administrations last days, some White House officials scrambled to spread information about Russian efforts to undermine the presidential election and about possible contacts between associates of President-elect Donald J. Trump and Russians across the government. Former American officials say they had two aims: to ensure that such meddling isnt duplicated in future American or European elections, and to leave a clear trail of intelligence for government investigators.
Of course, Clapper (& Comey a bit) deny outright that there were any FISA warrants issued. So that kills the 1st 2 reports (and makes them seem like "fake news"...BBC, Guardian, Mensch).