Northern Ireland’s second-biggest political party says it will block the formation of a working legislature in Belfast on Friday and will keep up the boycott until the U.K. government tears up post-Brexit trade rules it accuses of destabilizing the region.
The Democratic Unionist Party's move deepens Northern Ireland's political deadlock, which is fueling a U.K.-EU feud that could balloon into a trade war between Britain and the 27-nation European Union.
