President Donald Trump is calling on a Federal Reserve governor to resign over an accusation of mortgage fraud.

The U.S. dollar drifted on Thursday as investors fretted about the Federal Reserve's independence after yet another attack from President Donald Trump ahead of remarks from Chair Jerome Powell later this week that could influence the outlook for rates.

Powell is slated to give his annual address in Jackson Hole, Wyoming, on Friday. Swaps are pricing in a high probability the Fed will cut borrowing costs by a quarter point next month. In the face of mounting pressure from President Donald Trump for hefty reductions,

Board members can be removed only “for cause,” which has generally been interpreted to mean that the president can’t fire them over policy differences.