South Carolina’s Sen. Darline Graham (R) defended her headline-making debate performance — in which she blurted out “I’m not that informed on national security” — by insisting she was just “being honest.” Graham, 62, was appointed to finish out her brother Lindsey Graham’s term after the elder’s sudden July 11 death at age 71, and is running for a shot at the full term this fall after being endorsed by President Donald Trump. While Lindsey Graham was a well-known foreign policy hawk who spent decades in Congress, his sister tried to backpedal during a Wednesday appearance on Fox News’ Hannity,...