Iran is no longer entertaining a potential peace deal with U.S. negotiators.Tehran declared Friday that it would not meet with U.S. officials in Islamabad, adding that the White House’s demands are “unacceptable,” reported The Wall Street Journal’s senior Middle East correspondent, Summer Said.The country’s regional neighbors are still attempting to mediate the situation, offering Iranian officials other opportunities to settle the conflict with the U.S. Turkey and Egypt have offered new venues...