"We do not want a guarded border".
The US President-elect says the border between Northern Ireland and the Republic has to stay open after Brexit.
Joe Biden says there won't be a guarded border, and has discussed the issue with the Taoiseach and British Prime Minister Boris Johnson.
He has previously warned a UK-US trade deal would be under threat if there was a breach of the Good Friday Agreement.
Speaking to RTÉ News in Delaware on Tuesday, Biden said he did not want to see the return of a guarded border.
"We do not want a guarded border," he said. "We want to make sure we work 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."
Meanwhile, the President of the European Commission says talks between the EU and UK are entering "decisive days".
Updating MEPs in the European Parliament this morning, Ursula von der Leyen says progress has been made but there are still issues to be resolved:
''There are still three issues that can make the difference a deal and no deal, the crucial topics are for the European side are questions linked to linked to the level playing field, the governance and fisheries''.
