When Russia invaded Ukraine nearly three years ago, President Joe Biden set three objectives for the U.S. response. Ukraine’s victory was never among them. The phrase the White House used to describe its mission at the time—supporting Ukraine “for as long as it takes”—was intentionally vague. It also raised the question: As long as it takes to do what? [time-brightcove not-tgx=”true”] “We were deliberately not talking about the territorial parameters,” says Eric Green, who served on Biden’s National Security Council at the time, overseeing Russia policy.