Biden warns Britain: Don’t imperil N. Irish peace

US President Joe Biden will bring a serious Brexit warning to his first meeting with British Prime Minister Boris Johnson: Prevent a row with the European Union from imperilling the delicate peace in Northern Ireland.

On his first trip abroad since taking office in January, Biden meets Johnson on Thursday in the English seaside resort of Carbis Bay ahead of a Friday-Sunday G7 summit, a NATO summit on Monday, a US-EU summit on Tuesday and a meeting with Russian President Vladimir Putin in Geneva the following day.

Biden will try to use the trip to burnish his multilateral credentials after …