In tapping Judy Shelton to become one of two Federal Reserve Board governors, President Donald Trump selected one of the minority of mainstream economists supportive of a return to the gold standard and critical of central bank activity. Shelton, who serves as the U.S. executive director at the European Bank for Reconstruction and Development, wrote as recently as last year in support of pegging the dollar to gold prices. Trump announced his intention to nominate both Shelton and St. Louis Fed economist Christopher Waller via tweet on Tuesday. Shelton’s unorthodox monetary beliefs will likely draw questions from Senate lawmakers, who...