Iran’s policy in talks with world powers to revive the 2015 nuclear accord will remain unchanged after a June 18 presidential election because the issue is decided by its highest leadership, a government spokesman said on Tuesday. A host of barriers to the revival of the nuclear deal remain firmly in place ahead of talks due to resume this week, suggesting a return to compliance with the accord is still a way off, diplomats, Iranian officials and analysts said. “We have shown that we adhere to our international obligations under all circumstances, and this was a national decision,” cabinet spokesman Ali Rabiei told a weekly news conference. Rabiei said Iran’s nuclear policy, set by Supreme Leader Ayatollah Ali Khamenei, is not linked to internal developments and that the new government wou...