NATO leaders are descending on Washington. Here's what to know

NATO leaders meet this week for a summit commemorating the 75th anniversary of the military alliance, which has never been larger and more focused but is also facing potentially existential threats from outside and within.

NATO leaders meet this week for a summit commemorating the 75th anniversary of the military alliance, which has never been larger and more focused but is also facing potentially existential threats from outside and within.

If Russia’s war in Ukraine, challenges posed by an increasingly aggressive China, and the Israel-Hamas conflict in Gaza weren’t enough, some key members' commitment to defend their allies is coming under question.

There is deep uncertainty over President Joe Biden’s ability to beat his predecessor, NATO skeptic Donald Trump, in November to lead the most powerful member of the alliance.

While Biden’s political troubles are stirring concerns at home and abroad, countries in Europe are facing their own issues with a rise of far-right populism, particularly in France and Hungary, threatening what had been a bedrock pillar of post-World War II security and stability.

Here’s what to watch for at the three-day summit:

Reeling from his disastrous June 27 debate performance and struggling to hold his reelection campaign together, Biden says people should look to his interactions at the NATO summit for proof that he is still strong and vigorous enough to lead.

Diplomats and analysts say they will be watching closely — although NATO leaders accept they have no control over American elections and are unlikely to weigh in publicly.