A declassified court order on the Carter Page FISA applications states that the FISA court "found violations of the government's duty of candor in all four applications" to spy on Page. At least two of the four applications have already been ruled illegal.
https://www.intelligence.gov/assets/documents/702%20Documents/declassified/June_2020_FISC_Opinion.pdf
https://twitter.com/seanmdav/status/1306324520320589830?s=21