Listen: In 2019, Chinese President Xi Jinping and Russian President Vladimir Putin met at a summit and described their “friendship without limits.” But how close is that friendship, really? Should the US be worried about their growing military and economic cooperation? On the GZERO World Podcast, Ian Bremmer sits down with Pulitzer prize-winning national security correspondent for The New York Times David Sanger to talk about China, Russia, the US, and the 21st century struggle for global dominance.