“We are connected. It is often said, but it is always important to reaffirm it, ”Secretary of State Antony Blinken said at a press conference in Downing Street.
“We are bound by ties of friendship, family, history, shared values and shared sacrifice.”
But between the heated talks about a special relationship, there was a warning that the 1998 peace deal covering the terms of the UK-Ireland border must be honored despite problems since Brexit.
“The United States remains a steadfast supporter of a secure and prosperous Northern Ireland, in which all communities have a voice and can enjoy the gains of the hard-won peace,” said Blinken.
“Like many US presidents before him, President Biden was unequivocal in his support for the Good Friday deal, which was a historic achievement and one that we must protect.”
Mr Raab said London and Washington stand “side by side” on security issues, as in Iran and Afghanistan.
Asked about traditional alliances, he said: “I see the growing demand and need for agile clusters of like-minded countries who want to protect the multilateral system and I think you can see that among the guests we are bringing us to the G7 – South Korea, India, Australia and South Africa.
“So in that organic sense, I think we can see a shift towards this model of like-minded country clusters, nimble enough to work together.”
The press conference came as the UK prepared to host the first foreign ministers meeting on Tuesday for more than two years.
Mr Raab held face-to-face talks at Chevening House in Kent on Monday evening with Japanese Foreign Minister Toshimitsu Motegi, where they discussed trade, security cooperation and climate change.
Australia, India, Japan, South Korea and South Africa have been invited as guests as the UK seeks to deepen ties with the Indo-Pacific region.
Regular testing, size limits and other measures have been promised to prevent the spread of Covid-19 during talks.