Why has Lindsey Graham’s sister inherited his Senate seat after his death?

Three days after the sudden death of Republican Senator Lindsey Graham, his sister, Darline Graham Nordone, was sworn in on Tuesday to fill his vacant Senate seat at the suggestion of United States President Donald Trump.

Announcing his selection of the deceased senator’s sister on Monday, South Carolina Governor Henry McMaster introduced the new senator as Graham’s “darling little sister” who w...