The US could accept any Brexit deal from Britain and the EU, with the exception of any deal. In an ideal world, the U.S. government would have facilitated dialogue between the parties, as it has in the past; It would, for example, have helped to negotiate an acceptable variant of a backstop since then in Northern Ireland or to support efforts to restore the de decentralised government. At this point, the administration`s interventions that defend a party to their advantage are considered troublesome rather than useful. But at least it should refrain from advocating a Brexit without a disastrous deal that the BRITISH government`s contingency plans 33 show would have far-reaching negative consequences, including for the long-standing US interest in a peaceful and prosperous Northern Ireland. 9 All this explains why a purely commercial and strictly technical/technological solution to the problem of Irish border and migration controls after Brexit – and British Eurosceptic conservative circles, The European Research Group, supported by experts such as Shanker Singham, It is extremely imaginative in this regard7 – not only is it insufficient, but it is not politically relevant, as it does not address the total complexity and multidimensionality of the soft border system currently in place.8 The UK`s withdrawal from the EU necessarily means transforming the Irish border into a European external border: as such, it necessarily means going back to both the socio-economic and institutional provisions of the GMA. As fluid, fluid and invisible as Ireland`s future border controls will be after Brexit, they will have an impact on the Irish border regime as a whole. This complexity was revealed by the backstop problem.9 Although it was accepted by Theresa May to make Brexit compatible with the GFA and avoid a hard border in the event of a non-agreement, it was immediately rejected by northern Ireland`s unionists10. David Trimble himself, the GFA`s UUP negotiator, even threatened to question the legality of the backstop, calling it a violation of the Northern Ireland Act, 1998.11. any proposal from London to implement Brexit and restore border controls – with or without harmonization of legislation, at the border itself or elsewhere, with or without backstop – directly destabilizes Northern Ireland`s national institutional arrangements and the intergovernmental and cross-border agreements approved by London, Dublin and the Irish people, North and South of the GFA12. The completion of the European internal market in 1992 led to the end of goods controls.
However, during the riots in Northern Ireland, British military checkpoints occurred at major border crossings and British security forces made some, but not all, crossing points impassable. In 2005, in the implementation phase of the 1998 Good Friday Agreement, the last of the border checkpoints was abolished.  For decades, there has been a multi-party consensus in Washington on the importance of promoting and preserving the peace process in Northern Ireland.