Marie Yovanovitch told Insider in an interview that Russian President Vladimir Putin didn't need to launch a full-scale invasion of Ukraine when Donald Trump was president because Trump was giving Putin everything he wanted. With Trump, Yovanovitch said, Putin "could just sit back and let the good times roll." Yovanovitch, Trump's former ambassador to Ukraine, said the former president showed "strong, clear admiration" for Putin and other strongmen, disparaged US allies, and had longstanding "negative" views on NATO and other global alliances.