President Joe Biden visited Kyiv on Monday for the first time since Russia launched a full-scale invasion of Ukraine almost a year ago, demonstrating in dramatic personal fashion his commitment to the country and its struggle as the war enters an uncertain new phase. While in Kyiv, Biden met with Ukrainian President Volodymyr Zelensky as well as first lady Olena Zelenska at the Ukrainian presidential palace. Biden’s visit comes at a critical moment in the 12-month conflict, with Russia preparing for an expected spring offensive and Ukraine hoping to soon retake territory. The United States and other western nations have...