UNITED NATIONS -- UNITED NATIONS (AP) — President Donald Trump said Tuesday that he believed Ukraine could win back all territory lost to Russia, a dramatic shift from the U.S. leader’s repeated calls for Kyiv to make concessions to end the war.

Vice President Vance said the president's position isn't changing, as allies remain skeptical of a major shift.

President Donald Trump said Tuesday that Ukraine can win back all territory lost to Russia, a dramatic shift from the U.S. leader’s call on Kyiv to make concessions.

The Kremlin on Wednesday rejected the central arguments for U.S. President Donald Trump's rhetorical U-turn on the war in Ukraine, as nationalists and political insiders reacted with a mixture of defiance and mockery.

NEW YORK CITY — President Donald Trump said Tuesday that NATO allies should shoot down Russian aircraft encroaching on their airspace, and walked back earlier support for Russia to keep the Ukrainian territory it has won.

President Donald Trump "surprised" Ukrainian President Volodymyr Zelenskyy with his sudden support at the United Nations General Assembly. Ukraine is now set to address the U.N. on Wednesday, followed shortly after by Iran.

Vladimir Putin's ally, Dmitry Medvedev, issued a harsh rebuke of Donald Trump on Wednesday, saying on Telegram that the U.S. president has "slipped into an alternate reality" after Trump stated on Tuesday that Ukraine can reclaim all territory lost to Russia, marking a sharp shift from his earlier calls for Kyiv to make concessions.

Trump, after meeting with Ukrainian President Volodymyr Zelenskyy on the sidelines of the United Nations General Assembly on Tuesday, wrote on social media that he thinks Ukraine could win back its seized land. For months, Trump had said he believed Ukraine would have to cede territory in order to bring an end Russia's invasion.

World leaders reacted to Donald Trump's blunt U.N. speech where he claimed to have ended seven wars and threatened tariffs over Russian energy purchases.