Mojtaba Khamenei says Trump's signature is 'worthless' and that 'bullying' is a core element of US foreign policy.
Congressman Ro Khanna joins Sreenivasan Jain.
Trump’s NATO diplomacy is part of a wider effort to weaken Tehran by reshaping the region around it.
Former Obama official is expected to run for president in 2028, with speech reflecting shifting Democratic sentiments.
The negotiating process is fragile and recent US strikes show how hard it will be to reach agreement, writes BBC's International Editor Jeremy Bowen.
The US top diplomat commends Libyan leaders' efforts to 'overcome divisions' after talks with LNA's Saddam Haftar.