FBI wiretap petitions for Trump campaign contained key errors

Four FBI wiretap applications targeting a Trump campaign volunteer were more inaccurate than previously known based on subsequent investigative information, an analysis shows.

The FBI applications to federal judges under the Foreign Intelligence Surveillance Act (FISA) are a central focus of the Justice Department’s special review of how the Obama administration started its probe into the Donald Trump campaign.

Obtaining four surveillance warrants on Carter Page from October 2016 to September 2017 was one of the FBI’s most aggressive steps to try to prove that Trump associates conspired with the...