President Donald Trump’s attacks on Federal Reserve Chair Jerome Powell are so commonplace at this point that they barely register in financial markets these days. The rapidly intensifying multi-pronged efforts by Trump’s advisers to amplify and expand on Trump’s attacks are a good reason to rethink that indifference.

The Supreme Court said in May that it could block any attempts by the White House to dismiss Powell, noting as part of a separate ruling that the Fed “is a uniquely structured, quasi-private entity.”...

Republican members of Congress have attacked the Fed over the cost of the refurbishment, with Senate banking committee chair Tim Scott saying it appeared out of touch when ordinary Americans were str...