On this "Face the Nation with Margaret Brennan" broadcast, moderated by Margaret Brennan: Israeli Ambassador to the U.S. Michael LeiterDemocratic Sen. Mark Warner of VirginiaGOP Rep. Mike Turner of OhioKristalina Georgieva, managing director of the International Monetary FundClick here to browse full transcripts from 2026 of "Face the Nation with Margaret Brennan."   MARGARET BRENNAN: I'm Margaret Brennan in Washington.And this week on Face the Nation: Vice President Vance returns to the U.S. empty-handed following talks with Iranian leaders. But President Trump now says he's ordered the Navy to blockade the Strait of Hormuz.The 21 hours of negotiations ended early this morning in Pakistan.(Begin VT)J.D. VANCE (Vice…