The "Irish Backstop," has been designed by the EU to make it impossible for the UK to impose a hard border between the Republic of Ireland and Northern Ireland. It is of extreme importance to the EU, and especially the Republic of Ireland, that the border remains open. Many British MPs do not like the fact that there is no limit on this backstop because it binds the UK to EU laws for as long as it is in place. So, Theresa May has been charged by the British Parliament to go back to the EU to renegotiate this part of "the deal" so that the permanent imposition of the backstop is not possible. The EU is currently saying that it will not renegotiate and that the Irish Backstop has to stay. If it stays then it is almost certain that the British Parliament will not agree to the deal and we will automatically leave the EU without any deal on the twenty-ninth of March this year. This would mean an immediate hard border between the Republic of Ireland and Northern Ireland which is the last thing the EU wants. It would appear that the EU is threatening the UK with doing the thing it doesn't want to happen. Surely that is just plain daft.