Chad Wolf, the acting homeland security secretary, and Ken Cuccinelli, his acting deputy, were not appointed to their jobs lawfully, a government watchdog has found. In a decision released Friday, the Government Accountability Office, a congressional oversight body, determined that Wolf and Cuccinelli were appointed as a result of an “invalid order of succession.” The GAO’s decision does not have the force of law, but will likely help those who are suing to block policies Wolf has put in place.