The United States cannot turn the tide of war in Ukraine by pumping tens of billions more dollars into the country, the Kremlin said on Tuesday, ahead of planned talks between Ukrainian President Volodymyr Zelenskiy and U.S. leaders. Zelenskiy will make his case for more U.S. aid for Ukraine's war against Russia during talks in Washington later on Tuesday with U.S. President Joe Biden and Congressional leaders at a time of increasing doubts among many Republican lawmakers.