House Oversight Committee Chairman Trey Gowdy (R-S.C.) has written a letter to Environmental Protection Agency head Scott Pruitt, seeking answers about his frequent first-class travel that has been publicly scrutinized, the Washington Examiner reports.

Why it matters: Concerns from the outgoing South Carolina congressman signal that the questions surrounding Pruitt's travel expenditures are extending beyond Democratic criticism and into an actual GOP-led inquiry. Amid the scrutiny, Pruitt recently blamed the "very toxic environment politically" and security decisions for his expensive flights.