Tension between the United States and Iran is escalating ahead of this week’s U.N. General Assembly, where both Rouhani and Trump will speak. On Wednesday, Trump is chairing a U.N. Security Council briefing on “counter-proliferation.” He is expected to use the meeting to single out Iran. One of Trump’s top attorneys, Rudolph Giuliani, addressed an Iranian opposition group called the National Council of Resistance of Iran on Saturday. The group is tied to the MEK, which was once considered a terrorist organization by the United States. Giuliani openly backed the overthrow of the Iranian government.

Rudolph Giuliani: “I don’t know when we’re going to overthrow them. It could be in a few days, months or couple of years, but it’s going to happen. They’re going to be overthrown.”