India, Sept. 24 -- US President Donald Trump said he would back NATO countries that choose to shoot down intruding Russian planes, but said direct American involvement would depend on the circumstances.

Donald Trump, in a dramatic shift from his call to end the war, also said he believed Ukraine could win back all territory lost to Russia. He posted on social media soon after meeting with Ukrainian President Volodymyr Zelensky on the sidelines of the United Nations General Assembly gathering of world leaders.

"I think Ukraine, with the support of the European Union, is in a position to fight and WIN all of Ukraine back in its original form," Trump wrote on Truth Social.

"With time, patience, and the financial support of Europe and, in ...