DeJoy is slated to appear for a hearing before the House Oversight Committee on Sept. 17, but some lawmakers fear that could be too late and ineffective in forcing him to reverse changes.

Detais: A group of Senate Democrats led by Warren wrote a letter to the inspector general last week asking her to look into DeJoy’s policy changes, which include eliminating overtime for USPS workers, and whether DeJoy has “met all ethics requirements.”

DeJoy — a former Trump donor and fundraiser — still owns at least $30 million in equity in his former company, which is a USPS contractor, and recently bought stock options for Amazon, a USPS competitor, CNN first reported Wednesday.

A spokesperson for the USPS watchdog confirmed to CNN the office has “initiated a body of work to address the concerns raised, but cannot comment on the details.”

It is unclear if the inspector general has launched “a full-scale investigation into possible politicization at USPS by DeJoy,” or if it is just reviewing the matter for Congress, according to CNN.