Even if a Brexit “deal” gets done next week, it will only be the first in a series of mini-deals that need to be agreed before Brexit day. And the potential pitfalls are numerous.
Step one is for the British prime minister to get her seven or eight Brexiteer cabinet ministers on side for “backstop” plan to keep the Irish border open, in case a future trade deal is not done in time. Several cabinet ministers fear the backstop will lock them into EU rules indefinitely, and are...