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Chris Hipkins\' travel plans are up in the air, after Joe Biden cancelled what was to be a history-making trip to the Pacific.

Plans have been in the works for the US-Pacific summit, set down for Monday, in Papua New Guinea - with Prime Minister Chris Hipkins set to jet off to Port Moresby this weekend.

But the US President has pulled out of the meeting, with debt ceiling negotiations continuing in Washington, and congressional leaders speaking to Biden overnight.

Australia correspondent Steve Price told Mike Hosking the cancellation could be hugely significant.

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