Joe Biden says no border on the border of island
Speaking to reporters in Wilmington, Delaware, Mr Biden said: “We do not want a guarded border.
"We want to make sure we work too hard to get Ireland worked out.
"I've talked with the British prime minister; I've talked with the Taoiseach; I've talked with others and I've talked with the French.
"The idea of having the border north and south once again being closed, it's just not right.
"We've just got to keep the border open."
Mr Biden, who has made much of his Irish heritage, previously said there would be no UK-US trade deal if Britain violates the terms of the Brexit Withdrawal Agreement.
Boris Johnson, who argues parts of the deal are an infringement on British sovereignty, has been threatening to make this move.
Speaking in September the then presidential candidate said: "Any trade deal between the US and UK must be contingent upon respect for the agreement and preventing the return of a hard border. Period."
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