The U.S. has adjusted its flow of intelligence since the war began, and administration officials have said they have been giving Ukraine the most relevant information at any given moment. The Biden administration has not been willing to help the Ukrainians target Russian forces in Russia, and Republican lawmakers said that concern has extended to Russian forces in Crimea and the Donbas.
The Wall Street Journal reported earlier on the stepped-up intelligence sharing.
U.S. officials have defended the intelligence sharing with Ukraine. On Tuesday, Kathleen H. Hicks, the deputy secretary of defense, said intelligence support that we have provided has been vital. She said the information given to Ukraine had been high-end. As the Russian military shifted its strategy away from Kyiv to reinforcing operations in the Donbas, U.S. intelligence agencies began to look at whether their guidance on what information could be shared needed to be expanded, and changed that guidance earlier in April.
Republicans have criticised the Pentagon and the Office of the Director of National Intelligence, saying they have failed to provide enough information to Ukraine about Russian forces stationed in parts of eastern and southern Ukraine that those forces and Russian-backed separatist groups have occupied since 2014 and 2015.
In a letter released on Monday, Senate Republicans said they were concerned that not enough was being done to share critical intelligence with Ukrainians. Senator Marco Rubio and others wrote a letter asking for intelligence with the Ukrainians to help them retake every inch of Ukraine's sovereign territory, including Crimea and the Donbas.