What is Brexit?... What is the EU?... Why is the UK leaving?...
Why do people oppose the deal?
There are a broad range of complaints, many of which claim the deal fails to give back to the UK control of its own affairs from the EU.
One of the biggest sticking points has been over what happens at the Irish border.
Both the EU and UK want to avoid the return of guard posts and checks (here's why), so something called the backstop - a sort of safety net - was included in the deal.
What is the backstop?
The backstop is meant to be a last resort to keep an open border on the island of Ireland - whatever happens in the Brexit negotiations.
It would mean that Northern Ireland, but not the rest of the UK, would still follow some EU rules on things such as food products.
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