Speaking in Kyiv alongside the UK foreign secretary, David Lammy, Blinken said the US had "from day one" been willing to adapt its policy as the situation on the battlefield in Ukraine changed. "We will continue to do this," he said.
Blinken said he and Lammy would report back to their "bosses" - Joe Biden and Keir Starmer - after their talks yesterday with the Ukrainian president, Volodymyr Zelenskiy.
The foreign secretary suggested Iran's dispatch of ballistic missiles to Moscow revealed this week - had changed the strategic thinking in London and Washington. It was a "significant and dangerous escalation", he said.
He added: "The escalator here is Putin. Putin has escalated with the shipment of missiles from Iran. We see a new axis of Russia, Iran and North Korea."
Lammy urged China "not to throw in its lot" with what he called "a group of renegades".
UK government sources indicated a decision had already been made to allow Ukraine to use Storm Shadow cruise missiles on targets in Russia, although that is not expected to be announced tomorrow when Starmer meets Biden in Washington.
The two leaders are planning to discuss the war in Ukraine, and how it could be ended, as part of a wideranging foreign policy discussion.
They will avoid an intense focus on individual weapons systems, as the aim of the conversation is strategic.
Denne historien er fra September 12, 2024-utgaven av The Guardian.
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Denne historien er fra September 12, 2024-utgaven av The Guardian.
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