The Federal Reserve opted for no action on its benchmark rate for the second time in as many meetings under Chairman Kevin Warsh, who arrived at the Fed in May promising a new chapter but has faced the same old challenges that have defined central bank policy during President Donald Trump’s second administration.  Members of the FOMC voted 9-3 to hold rates flat. Three members, Beth Hammack, Neel Kashkari and Lorie Logan voted for a quarter-point rate hike. The customary statement that comes with the decision was effectively unchanged after Warsh opted to cut its scope and length last month in his first meeting as...