Biden is going to Rome for the G20 summit. Here's what we're watching

President Biden travels to Rome for the G20 summit, with a follow-up stop in Glasgow for a UN climate conference, as leaders confront a fractured set of priorities. The G20 comprises 19 nations plus the European Union, including the United States, China, India, and others, collectively representing about 60% of the world’s population and more than 80% of global GDP; leaders have met since 2008 to coordinate policy despite diverse systems. Vaccine equity remains a central issue, as vaccination goals for the developing world appear unlikely to be met this year. The U.S. has donated 200 million doses and aims to deliver more than 1 billion by next fall, prompting scrutiny of access and distribution.