Polish President Karol Nawrocki entered the Constitutional Tribunal in Warsaw overnight amid a power struggle after judges suspended its president and deputy.

Matthew Søberg Shugart, Tim Bale, Matthew Goodwin, Kim L. Scheppele, Anders Aslund and 28 more

Neue Zürcher Zeitung, Politico Europe, Gazeta Wyborcza and 11 more

The United States approved a $2.1 billion sale of 500 Patriot interceptors to Ukraine, funded by European allies, as President Volodymyr Zelenskyy urged immediate delivery.

François Heisbourg, Scott Lucas, Alan Sked, Iikka Korhonen, Anne Applebaum and 7 more

The U.S. Justice Department confirmed a criminal inquiry into alleged election fraud involving a purported spoiler candidate in Alaska’s Senate race, while Democrats accused it of pursuing political ends.

Brendan Nyhan, Michael D. McDonald, Dana R. Fisher, Scott Lucas, Nancy M. Wingfield and 9 more

Countries at the U.N. biodiversity summit in Armenia adopted measures to accelerate nature protection but left key funding questions unresolved.

Matthias C. Rillig, David B. Roy, Elisa Morgera, UN Environment

A $6.3 billion cyber heist at Binance prompted rival crypto exchanges to tighten fund-transfer alerts and restrictions as Binance drew on reserves to cover losses.

Olivier J. Blanchard, David R. Miller, Paul Langley, Fabián Muniesa, Garrick Hileman and 12 more