UK Prime Minister Theresa May's visiting Northern Ireland (on Tuesday) as she seeks a Brexit deal that can avoid a hard border with Ireland.
She'll tell business leaders there a deal can be secured that can win a majority in Parliament as well as EU backing.
So far the EU has insisted it will not renegotiate the already-agreed Irish border backstop solution in the Withdrawal Agreement.
But Mrs May needs to win changes to it to gain the backing of enough of her Conservative MPs.
Former US Senator George Mitchell - who was heavily involved in the Northern Ireland peace process - says all sides need to take care with the issue.
IN: "Reason...
OUT: ...more possible."
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