Remember Adam Schiff and others screaming this will damage national security and give up sources and methods?? Pretty obvious they lied Bigly. Anyone claiming otherwise is a partisan hack.
It may very well damage the credibility of the FBI for some time and of the Justice Department, and it may make some judges more skeptical about their presentations of probable cause for warrants, and it may even raise questions about the legitimacy of warrants issued to the FBI in other cases, but in the long run it will strengthen national security by protecting our justice system from those, even those in very high office, who would subvert it for political purposes.