President Trump reversed himself on one of the key foreign policy issues of his presidency on Tuesday, abandoning his insistence that Ukraine give up land to strike a peace deal with Russia and instead declaring that Ukraine, with the support of Europe, was “in a position to fight and WIN all of Ukraine back in its original form.”

His turnabout on social media shortly after a meeting in New York with President Volodymyr Zelensky of Ukraine was a head-spinning pivot.