America's labor market is flashing red, and the Federal Reserve is watching the light change instead of hitting the brakes. Job openings have fallen to 7.26 million, the lowest level in 4½ years. Private-sector hiring has turned negative, with September's ADP data showing -32,000 jobs after August was revised down to -3,000. Employers' plans to add workers have plunged 71% from last year, and year-to-date hiring announcements are the weakest since 2009. The Fed must move decisively by cutting rates 50 basis points in both the October and December meetings to prevent further...