For nearly 20 years, one question has been asked, over and over, about Hillary Clinton's closest, most enigmatic aide: Who is Huma Abedin?

As the election hurtles to its inglorious end, that question has taken on new weight.

With the FBI looking into Clinton emails contained on a laptop shared by Abedin and estranged husband Anthony Weiner — himself now the subject of an FBI investigation for sexting with a 15-year-old girl and sending a crotch shot with his toddler son sleeping next to him — Abedin has gone from loyalist to liability.

Though she hasn't been seen with Clinton since the story broke on Oct. 29, the campaign insists she is not going anywhere.

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