South Carolina GOP Sen. Lindsey Graham on Sunday said North Carolina Lt. Gov. Mark Robinson "has an obligation to defend himself" after reports surfaced this week about lewd posts Robinson made on a pornographic website over a decade ago.

South Carolina GOP Senator Lindsey Graham expressed concern over reports of lewd posts made by North Carolina Lt. Gov. Mark Robinson, urging him to defend himself or pursue legal action if the allegations are false. Graham also discussed potential changes to Nebraska's electoral college system.