The 8 unresolved questions in Trump's Iran deal

The U.S.-Iran deal was signed electronically on Sunday by President Trump, Vice President Vance and Iranian parliamentary speaker Mohammad-Bagher Ghalibaf, senior administration officials told reporters on Monday. Why it matters: The deal is already testing whether Washington and Tehran can turn a battlefield pause into a broader settlement — starting with the Strait of Hormuz, and then moving to the far thornier question of Iran's nuclear program.State of play: A 60-day ceasefire extension is i...