President Trump's letter to Iran's Supreme Leader Ali Khamenei included a two-month deadline for reaching a new nuclear deal, one U.S. official and two sources briefed on the letter told Axios. Why it matters: It isn't clear whether the two month-clock begins from the time the letter was delivered or from when negotiations start.

This comes as Iran, Russia and China met for a meeting and called upon the United States to end its sanctions on Tehran.