Ed Martin, who has been appointed to investigate the Federal Housing Finance Agency’s allegations of mortgage fraud against several government officials including Cook, sent Powell a letter encouraging him to remove Cook from the board after President Donald Trump publicly called for her to resign on Wednesday.

Federal Reserve Chair Jerome Powell is set to address an annual gathering of central bankers and economics bigwigs at a mountain resort in Jackson Hole, Wyo., Friday. Here's what you need to know: What exactly is the Jackson Hole Economic Policy Symposium?

The Trump administration has pressured Powell, whose term as Fed chair expires next year, to step down as chair of the central bank.