InsideEPA, an EPA trade sheet, reports that Scott Pruitt’s downfall is the work of disgraced former White House aide Rob Porter, who leaked damaging information about Pruitt to retaliate against a former girlfriend who told White House officials about Porter’s history of domestic violence.

As was basically reported at the time, Porter’s downfall seems to have started when a former girlfriend, Samantha Dravis, went to White House officials and told them what she knew about Porter’s past, particularly his abuse of two ex-wives. Dravis was a top aide to Scott Pruitt, the EPA Administrator.

It was never explicitly clear whether Porter had also abused Dravis. But she seems to have been a key reason why his past came to light. InsideEPA is reporting that in retaliation, Porter started leaking information about her boss, Pruitt. From the article: “Rob Porter, a top former aide to President Donald Trump who was fired earlier this year over domestic abuse allegations, is reportedly a source of information about EPA Administrator Scott Pruitt’s ethical transgressions that are threatening his future at the agency, after Porter’s relationship with a top former Pruitt aide soured, sources say.”

Dravis’s resignation was announced earlier today.