Joe Biden and Liz Truss discuss importance of Northern Ireland Protocol

The US President has stressed the importance of reaching an agreement with the EU over post-Brexit legislation on Northern Ireland in his first phone call with the new British prime minister (Oliver Contreras/PA)

The US President has stressed the importance of reaching an agreement with the EU over post-Brexit legislation on Northern Ireland in his first phone call with the new British prime minister.

The transatlantic relationship could be strained if Liz Truss pushes ahead with the plan to override parts of the Northern Ireland Protocol, with Joe Biden proud of his Irish roots and taking a keen interest in the issue.