New Delhi, May 22 -- As negotiations with the United States hang in the balance, a hard-line Iranian general linked to notorious attacks at home and abroad over the past decades is believed to have seized a place near the center of power.

Brig. Gen. Ahmad Vahidi, who heads Iran's paramilitary Revolutionary Guard, has become a major player in formulating Iran's tough stance in negotiating a possible end to the war with the United States, experts say. He is believed to be part of a small clique in direct contact with Iran's Supreme Leader Ayatollah Mojtaba Khamenei, who remains in hiding after being reportedly wounded in the Feb. 28 Israeli strikes that killed his father, Ayatollah Ali Khamenei.

Like everything in Iran since the war began...