Darline Graham faces make-or-break GOP runoff in historic bid to keep brother’s Senate seat

Statewide runoff elections are testing the clout of Donald Trump's endorsements in South Carolina and Oklahoma. Darline Graham faces a make-or-break GOP Senate nomination runoff in South Carolina to succeed her late brother, Lindsey Graham. Separately, Mike Mazzei is backed by Trump for the gubernatorial nomination in Oklahoma, while a special election runoff also takes place in Georgia.