In remarks to Democrats Friday night that were first reported by the Washington Examiner, the Obama-era attorney general accused congressional Republicans of abandoning their duties of oversight over the executive branch.
"There is rampant corruption within the Trump Cabinet, but a Congress full of Republicans is simply unwilling to conduct oversight or to hold them accountable," Holder said.
Holder didn't go into further detail about his criticism, but his remarks come amid a series of damaging news reports surrounding EPA administrator Scott Pruitt, who is accused of living for months in a condo owned in part by the wife of a top energy lobbyist and directing staff to approve raises for longtime aides even after the White House rejected the pay increases.
Pruitt is only the latest Cabinet member to be accused of questionable financial decisions.
In his remarks, Holder also attacked the Trump administration's decision to exit the Paris climate accord, as well as the degradation of NATO alliances.
"Decades old ‐ and effective ‐ alliances have been questioned. The effectiveness of the North Atlantic compact that has ensured peace ‐ and prosperity ‐ for over seventy years, and after the bloodiest century in the history of mankind, is now doubted," he said.