Boris Johnson faces a daunting task in trying to secure parliamentary approval for his Brexit deal after Northern Ireland’s Democratic Unionist party came out against the new withdrawal agreement. Analysis by the Financial Times suggests that unless the prime minister can persuade the DUP to drop its opposition, or persuade several Labour MPs or independent parliamentarians to support the deal, Mr Johnson will struggle to win a House of Commons majority. The FT estimates 321 MPs could vote against the deal, with 318 supporting it. Many members have yet to declare how they will vote when the Commons considers Mr Johnson’s deal on Saturday. It will be the first Saturday sitting since Argentina’s invasion of the Falkland Islands in 1982. The Conservatives do not have a majority in the House, so Mr Johnson has to assemble a coalition of MPs to vote for his Brexit deal. Out of the 287 Tory MPs, nearly all are expected to back the deal, including most of the 28 ha...