Heh. well, the FBI will claim the snooping was legal, see this here warrant. But you raise a point that isn;t much talked about, that being how much snooping is going on WITHOUT a warrant.
Good chance that the FBI seeks a warrant AFTER it's illegal snooping uncoveres something that might pass scrutiny at the FISC (FIS Court, the entity that handles FIS Act warrants)
Suppose Carter Page talked to Trump about the campaign.
Does that call get recorded, transcribed, unmasking Trump and circulated in 0bama’s Presidential Daily Briefing to over 30 people including his politicos?
100% of ALL electricity based communications (most say world wide but certainly in the western world) since AT LEAST 1970. That's not a rumor. That's a fact Qx learned in his Navy job from a colleague who had experience in such things.
Unconstitutional stuff has been going on a long time.