The decision ends an investigation, one of several undertaken by the Justice Department into President Donald Trump’s perceived adversaries, that for months had failed to gain traction as prosecutors struggled to articulate a basis to suspect criminal conduct.

The Justice Department has ended its probe into Federal Reserve chair Jerome Powell, clearing a major roadblock to the confirmation of his successor, Kevin Warsh.

U.S. Attorney for the District of Columbia Jeanine Pirro said on X on Friday that her office was ending its probe into the Fed’s extensive building renovations because the Fed’s inspector general would scrutinize them instead.