The U.S. Attorney’s Office in Philadelphia has been required by a federal judge to answer concerns that a racketeering case against the ironworkers’ union isn’t properly staffed.

“We consider this a priority case of the U.S. Attorney’s Office. We have devoted and will continue to devote substantial resources to the case,” First Assistant U.S. Attorney Louis Lappen said in a prepared statement after U.S. District Judge Michael Baylson of the Eastern District of Pennsylvania expressed concern that there were too few prosecutors for a complex case.