evidence: The backstop proved one of the most contentious issues in parliamentary debates on the draft Withdrawal Agreement. The Democratic Unionist Party (DUP) opposed it because it would have introduced differences in regulation between Northern Ireland and the rest of the UK, which it saw as a threat to Northern Ireland’s place in the Union. A majority of people in Northern Ireland supported the backstop, however, as it gave them privileged access to both the UK and EU markets. In January 2019, the UK government published proposals on how the UK, including the Northern Ireland executive, could influence both the decision to use the backstop and its governance if it came into effect, as well as a commitment that the rest of the UK would unilaterally align with the single market regulations being applied in Northern Ireland. Other Brexiteers are opposed to the backstop because it would mean the UK remaining in a customs territory with the EU, removing the UK’s ability to vary its tariffs, a key component of trade deals.