KEY POINTS
  • In the deepening ties between China and Russia, President Joe Biden faces a nightmare scenario that could prove to be the most significant and underrecognized test of his leadership yet.
  • The scale and intensity of the latest military moves by China and Russia in Taiwan and Ukraine, respectively, demand immediate attention.
ST PETERSBURG, RUSSIA JUNE 7, 2019: China's President Xi Jinping (L) and Russia's President Vladimir Putin at a plenary session at the 2019 St Petersburg International Economic Forum (SPIEF).

President Joe Biden faces a nightmare scenario of global consequence: stepped up Chinese-Russian strategic cooperation aimed at undermining U.S. influence and at upending Biden's efforts to rally democratic allies.   

It is the most significant and underrecognized test of Biden's leadership yet: It could be the defining challenge of his presidency.