I have seen the operation described as a covert counterintelligence operation. I have understood before that covert operations like operation zero footprint require a presidential finding and notification of the gang of eight in congress.
in 2016 the Gang of eight included Pelossi and Schiff in the House and Schumer and Feinstein in the Senate.
on the Republican side we had McConnel and Burr in the senate and Ryan and Nunes in the House.
Ryan retires and Nunes claims improper behavior. Nunes gets investigated for improper behavior involving communicating with Trump.
Thing is, if there was a finding then the script for Pelosi and Schiff was laid in place by Obama.
Apparently Clapper said in an interview on CNN that Obama told Strzok to do the investigation.