According to Volker, Russia's refusal to take measures to end the armed conflict and support the resolution on the establishment of peace was a great disappointment for the U.S. authorities and made them take such a step.
He says it is extremely important to realize that Ukraine needs to be a successful country in the absence of progress in the negotiations. Being a part of the international community, he said, Ukraine has the right to defend itself and the U.S. supports it.
The U.S. ambassador said that he had held two meetings with Russian presidential aide Vladislav Surkov - in August and early October 2017 - which the diplomat described as positive and having a constitutional character. According to Volker, it was obvious that Russia started backing of on it during their next meeting in November 2017 which eventually made the U.S. lift restrictions on arms sales to Ukraine in December.
On Dec. 25, 2017, ABC News reported quoting a source in the U.S. Department of State familiar with the matter as saying that President Donald Trump considered supplying Ukraine with 35 Javelin anti-tank missile systems and 210 missiles worth $47 million.