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

President Donald Trump has for months wanted to remove Jerome Powell as chair of the Federal Reserve.

The Federal Reserve kept its key interest rate unchanged Wednesday and Chair Jerome Powell highlighted the increasingly uncertain outlook for the U.S. economy and inflation in the wake of the Iran war, suggesting the Fed could stand pat for an extended period.

The Iran war has scrambled the Federal Reserve’s outlook on inflation and unemployment and will likely further delay interest rate cuts this year, putting off any relief for consumers struggling with high borrowing costs for home and car purchases.