The request by Mr. Giuliani provoked an immediate objection from Mr. Tillerson, who argued that it would be highly inappropriate to interfere in an open criminal case, according to two people briefed on the meeting.
The gold trader, Reza Zarrab, had been accused by federal prosecutors of playing a central role in an effort by a state-owned Turkish bank to funnel more than $10 billion worth of gold and cash to Iran, in defiance of United States sanctions designed to curb Iran’s nuclear program.