Overnight Energy: Pruitt gets Senate grilling | Dems want investigation into Pruitt's security chief | Interior officers arrested 13 in border surge | Advisers pan science 'transparency' plan | TheHill

PRUITT'S DAY ON THE HILL: Environmental Protection Agency (EPA) head Scott Pruitt sat before a Senate subcommittee Wednesday, where senators peppered him with questions about his spending and ethics controversies, as well as