Explainer - How the Brexit deal is shaping up

Even as British Prime Minister Theresa May battles critics in her own party, she may be closing in on a Brexit deal which has been stymied by arguments over the Irish border.The stumbling block seemed to be May calculating that an EU demand for a special "backstop" clause for Northern Ireland could not win support from her own party and allies in parliament -- at least not just for the moment.Both sides want to avoid a "hard border" on the island of Ireland -- customs posts that could reignite v