Fusion GPS head: FBI heard aspects of Steele dossier from Trump insider

Donald Trump frowns at a campaign rally
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Fusion GPS head Glenn Simpson told Senate Judiciary Committee staffers in August that the FBI had independently received information from an Trump campaign insider that led them to find some of the allegations in former MI6 agent Christopher Steele's Trump-Russia dossier credible. That revelation comes from a transcript of his testimony to the committee released unilaterally today its ranking member, Sen. Dianne Feinstein.

Why it matters: If true, that information — which Simpson testified Steele told him after a meeting with the FBI in Rome in July 2016 — would significantly bolster the credibility of the controversial dossier, which has become a sort of partisan football in the ongoing Trump-Russia battle in Washington.