![President Biden amid concerns that US leadership on the Russia-Ukraine war has made Europe too reliant](https://www.worldpoliticsreview.com/wp-content/uploads/2023/02/russia-europe-war-us-ukraine-aid-nato-biden-putin-02062023-1.jpg?w=519&h=259&crop=1)
Since Russia’s invasion of Ukraine, the U.S. has made alliance-management its top priority in Europe, and the extent of Western cohesion over the past year has underscored the degree to which those efforts have paid off. Yet after one year of war, U.S. leadership has encountered a paradox: It is too successful for its own good.