We'll block trade deal if Brexit imperils open Irish border, say US politicians | The Guardian |

Any future US-UK trade deal would almost certainly be blocked by the US Congress if Brexit affects the Irish border and jeopardises peace in Northern Ireland, congressional leaders and diplomats have warned.

Boris Johnson has presented a trade deal with the US as a way of offsetting the economic costs of leaving the EU, and Donald Trump promised the two countries could strike "a very substantial trade agreement" that would increase trade "four or five times".

Trump, however, would not be able to push an agreement through a hostile Congress, where there would be strong bipartisan opposition to any UK trade deal in the event of a threat to the 1998 Good Friday agreement, and to the open border between Northern Ireland and the Republic.

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"The American dimension to the Good Friday agreement is indispensable," said Richard Neal, who is co-chair of the 54-strong Friends of Ireland caucus in Congress, and also chairs the powerful House ways and means committee, with the power to hold up a trade deal indefinitely.

"We oversee all trade agreements as part of our tax jurisdiction," Neal, a Democratic congressman from Massachusetts, said in a phone interview. He pointed out that such a complex trade deal could take four or five years, even without the Northern Ireland issue.

Maastricht Treaty, end of the Cold War, NATO expansion eastward and solidarity within the EU ...

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