UK plans to change Brexit rules threaten US trade deal, top Democrats say

Altering terms of withdrawal agreement on Northern Ireland could damage relations under Biden presidency

Senior Democrats have warned that any attempt by the UK government to backtrack on the Brexit agreement on Northern Ireland would jeopardize a future US-UK free trade deal and could hobble bilateral relations across the board if Joe Biden wins the presidency.

Biden, an Irish American, is a staunch defender of the Good Friday Agreement, of which the US is the guarantor, and which requires an open border between the Republic of Ireland and Northern Ireland.