For the United States and global allies, backing Ukraine “for as long as it takes” continues to present tradeoffs.
Vows to supply more weapons systems and air defenses come with practical considerations, assessments of risk and reevaluations of how Russia’s war with its neighbor might eventually end.
NATO nations have committed to send Ukraine billions of dollars in sophisticated Western weapons — including about $17 billion from the United States alone. But old, surpl...