Giuliani is a leading candidate to be Trump's secretary of state: source

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The source said John Bolton, who served as U.S. ambassador to the United Nations under President George W. Bush, was also under consideration to head the State Department.

Besides Giuliani and Bolton, former U.S. House of Representatives Speaker Newt Gingrich has also been reported as a possible secretary of state.

Giuliani, a vocal supporter of Trump during his presidential campaign against Democrat Hillary Clinton, had previously been reported as a candidate for attorney general.

   

(Reporting by Steve Holland; Writing by Mohammad Zargham)