The Democratic Unionist Party, the largest party representing the Unionist community, who want Northern Ireland to remain part of the United Kingdom, is refusing to enter the assembly because of the standoff over the part of the Brexit Agreement known as the Northern Ireland protocol. This has left Northern Ireland subject to some European Union trade regulations, to avoid the reintroduction of a hard border between the North, which is part of the UK, and the Republic of Ireland, which is part of the EU.