Nearly three years after President Vladimir Putin invaded Ukraine, his troops are making steady progress on the battlefield. Kyiv is grappling with shortages of men and weapons. And the new U.S. president could soon halt Ukraine's massive supply of military aid.

That will take some doing. Putin remains uninterested in peace talks as long as Russian troops continue to gain ground in Ukraine’s east, albeit at a slow pace, and while Ukrainian forces hold seized territory in the Kursk region inside Russia, according to John Herbst, a former U.S. ambassador to Ukraine, and other former officials.

MOSCOW (Reuters) - Preparations for a meeting between Russian President Vladimir Putin and U.S. President Donald Trump are at an "advanced stage", Russian state news agency RIA quoted a senior lawmaker as saying on Thursday.