President Trump’s break from a strategy agreed to with European allies could give President Vladimir V. Putin of Russia an edge as talks to end the fighting continue.

Ukrainian President Volodymyr Zelenskyy will meet Monday in Washington with U.S. President Donald Trump, who has shifted to saying an overall peace agreement – and not a ceasefire — was the next step...

Trump said that “there’s no deal until there’s a deal,” after Putin claimed the two leaders had hammered out an “understanding” on Ukraine and warned Europe not to “torpedo the nascent progress.”