How the Drive to Find a Conspiracy Against Trump Rocked the Justice Dept.

The push to investigate what the president’s allies saw as a “deep state” cabal intent on taking him down set off cascading crises, ended careers and undercut the department’s credibility with judges.The F.B.I. director Kash Patel’s “grand conspiracy case” sought to tie together actions by a group of people that President Trump blamed for various investigations into him.