From CNN:

Washington (CNN)Acting Customs and Border Protection Commissioner John Sanders is resigning, he said in a message sent to agency employees Tuesday, amid the dramatic increase in the number of undocumented migrants crossing the border, a fight over how to address it and controversy over how children are being treated.

...Acting Immigration and Customs Enforcement Director Mark Morgan is expected to take over as Customs and Border Protection in an acting capacity, according to a Department of Homeland Security official. Sanders's resignation as acting head of CBP comes amid a crush of migrants at the border that has overwhelmed facilities. Acting US Customs and Border Protection Commissioner John Sanders to leave - CNNPolitics

Just what's not needed--more "novelty."