Axios

President Biden convened with leaders of the world's largest economies Sunday to address supply chain disruptions and strategize how to fortify the entire "ecosystem over the long term."

The big picture: The global supply chain has struggled against the backdrop of rising demand, labor shortages and manufacturing delays, as countries have begun to emerge from the economic damage they incurred during the coronavirus pandemic.

Iranian Foreign Minister Hossein Amir-Abdollahian on Sunday questioned the U.S.' political will to return to the 2015 nuclear deal, saying that President Biden could simply issue an "executive order" on the matter if he wished to, Reuters reported.

Why it matters: Amir-Abdollahian's comments come only a day after Biden and the leaders of Germany, France and the United Kingdom issued a joint statement urging Iran to return to nuclear negotiations soon to avoid “a dangerous escalation.”

President Biden raised concern over Turkey's purchase of a Russian missile system in a meeting with Turkish President Recep Tayyip Erdoğan on Sunday, per the White House, saying their respective countries need to find an "effective way" to manage disagreements.

Why it matters: Relations between the two countries have been tested over issues like a threat to expel foreign envoys, including a U.S. ambassador, that Erdoğan has since walked back, and Turkey purchasing Russian-made weaponry.

President Biden and Felix Tshisekedi, president of the Democratic Republic of the Congo, met Saturday to discuss a deal that would sell up to 110 million COVID vaccine doses to African countries.

Driving the news: The agreement between Moderna and the African Union is intended to help countries that are behind on vaccination targets set by the World Health Organization due to access and availability of vaccines.

President Biden received Communion on Saturday while visiting St. Patrick's Church in Rome.

Why it matters: The U.S. Conference of Catholic Bishops this year sparked debate over whether politicians who support abortion rights should be denied Communion. But after spending time with the pope on Friday, Biden told reporters that Francis believes he should continue to receive Communion, adding that the pope "was happy that I was a good Catholic."

President Biden and the leaders of Germany, France and the United Kingdom met on Saturday and called on Iranian President Ebrahim Raisi to return to nuclear negotiations soon in order to avoid “a dangerous escalation.”

Why it matters: The joint statement, released after the four met on the sidelines of the G20 summit, was intended to demonstrate that the United States and its European allies are united in their approach going into renewed talks with Iran.

President Biden is about to have his first big opportunity to rally global climate action as he visits Rome for the G20 meeting and Glasgow for the crucial COP26 climate summit.

The big picture: Biden will arrive in Glasgow on Monday with a significant new goal: $555 billion in climate-related spending. But tensions with China, lingering mistrust of the U.S. on climate and the inherent difficulties of corralling 197 countries are all working against him.

The U.S. government's Afghanistan watchdog on Friday slammed the State Department and Pentagon for withholding what he said was crucial information about U.S. operations during the 20-year war.

Why it matters: The details "almost certainly would have benefited Congress and the public in assessing whether progress was being made," special inspector general for Afghanistan reconstruction John Sopko said at an annual conference for military reporters and editors in Arlington, Virginia.