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 be honest here — I’m not on national security. I’m not that informed on national security, but I do support the military.”

That response — admitting there’s an entire and extremely important category of public policy and governing responsibility that she just doesn’t know — would be humiliating for any Senate candidate, but it was worse considering her brother’s personal interest and commitment to it.

It was also another reminder that President Trump, who has lent considerable support to her candidacy, doesn’t care about qualifications, expertise, or even electability when he backs candidates for public office.........

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