The US. enters Northern Ireland. Boris Johnson is being warned about the Brexit regulations

Unionists lashed back today after the US waded into the Northern Ireland Brexit rules row – warning that all hopes of a Transatlantic trade deal will be off if Boris Johnson puts peace at risk.

In a stark message, House Speaker Nancy Pelosi branded the PM’s threat to axe the protocol ‘deeply concerning’.

And she insisted there is no chance of the US Congress support a free trade pact with the UK if the Good Friday Agreement is undermined.

The intervention will set alarm bells ringing in Downing Street after months of efforts to convince Joe Biden‘s White House that the protocol is the source of rising sectarian tensions in the province.

But unionists vented fury at Ms Pelosi’s ‘interfering’, saying she was ‘entirely unhelpful’ and ‘hopelessly out of date’.

Ms Pelosi said in her statement: ‘The Good Friday Accords are the bedrock of peace in Northern Ireland and a beacon of hope for the entire world.

‘Ensuring there remains no physical border between the Irish Republic and Northern Ireland is absolutely necessary for upholding this landmark agreement, which has transformed Northern Ireland.’