Republican senators appear to have been blocked by the Department of Justice from getting answers about the Hunter Biden investigation from the U.S. attorney’s office in Delaware.

After repeatedly being stonewalled by DOJ headquarters in Washington D.C., Sens. Chuck Grassley (IA) and Ron Johnson (WI) sent a May letter to U.S. attorney David Weiss, who is handling the Biden criminal case.

The senators asked about possible conflicts of interest and the existence of recusals within the Justice Department, raised concerns about the president’s son’s claims of judicial influence in Delaware, pressed the federal prosecutor on whether he was being properly supported by Main Justice, and inquired about what steps he had taken during his investigation.

DOJ headquarters was clearly alerted to the letter, because it was it, not Weiss, that responded to Grassley and Johnson, denying their requests for information.