Trump Takes Endorsement Gamble to South Carolina as Darline Graham’s Senate Bid Faces National-Security Heat

President Donald J. Trump is heading to South Carolina on Friday to rally behind Darline Graham, the political newcomer seeking a full six-year U.S. Senate term after being appointed to complete the late Senator Lindsey Graham’s remaining term. The rally comes at a particularly awkward moment: Graham is facing renewed scrutiny after telling voters during...