But US officials publicly and privately insist that Washington has no plans to send US-made tanks to Ukraine for now, arguing that they would be too difficult for Kyiv to maintain and would require a huge logistical effort to simply run.The United States aims to break the dynamic of grinding warfare and near-frozen front lines in Ukraine with newly announced military capabilities that it hopes will breath fresh momentum into Kyiv’s battle against Russian forces, a senior Pentagon official said on Wednesday.But Colin Kahl, the Pentagon’s top policy adviser, said the Pentagon still was not prepared to meet Kyiv’s calls for gas-guzzling M1 Abrams main battle tanks.Polish Prime Minister Mateusz Morawiecki on Monday urged Germany to send Ukraine the weaponry it needed to take the fight to invading Russian soldiers, lacing a speech in Berlin with implicit criticisms of Olaf Scholz’s government.“We are very optimistic that we will make progress on this requirement by the end of the week,” a second US official said."