Has Donald Trump lost his golden touch?

On Tuesday night, Darline Graham, sister of the late Sen. Lindsey Graham, revealed somewhat awkwardly that she is entirely unprepared to be a U.S. senator. At a South Carolina debate , she was asked a perfectly reasonable and straightforward question: “Are Taiwan and the South China Sea national security issues for the United States?” And, “If so, why?” She sheepishly responded, “I’m just going to…