New York Rep. Elise Stefanik, President-elect Donald Trump’s pick for US ambassador to the United Nations, is now refusing to stand by her previous push for Ukraine’s NATO membership — a stance she once framed as critical to regional stability. Her office also declined to say whether she still believes Russia committed genocide in Ukraine, as she said in 2022. In 2022, Stefanik urged NATO to admit the nation, especially as Russia’s invasion escalated. At the time, she argued for extensive...