Newly released documents show that Halper's spying was much more extensive than originally reported.

From JustTheNews.com:

Once-secret reports show the FBI effort to spy on the Trump campaign was far wider than previously disclosed, as agents directed an undercover informant to make secret recordings, pressed for intelligence on numerous GOP figures, and sought to find "anyone in the Trump campaign" with ties to Russia who could acquire dirt "damaging to Hillary Clinton."

The now-declassified operational handling reports for FBI confidential human source Stefan Halper — codenamed "Mitch" — provide an unprecedented window both into the tactics used by the bureau to probe the Trump campaign and the wide dragnet that was cast to target numerous high-level officials inside the GOP campaign just weeks before Americans chose their next president in the November 2016 election...