The C.E.O. of JPMorgan Chase, who has rarely taken on President Trump during his second term, wades into the argument over the Federal Reserve chair.

Many on Wall Street have privately worried that political pressure will undermine the Federal Reserve’s credibility.

JPMorgan Chase CEO Jamie Dimon went to bat Tuesday for the Federal Reserve and its chair, Jerome Powell, as the White House pondered ousting him over disagreements about the path of short-term interest rates.