Minutes after Leo Varadkar made his resignation speech yesterday afternoon, a Northern Ireland friend who saw him at several events on the Saint Patrick’s week circuit in the US sent me a message. “He wasn’t in great form last week. I noted that he exited every event after staying a short time. Indeed, at the Irish Embassy he was sitting on his own for a time while some of the crowd tried to drink the place dry.” Three weeks ago, the Taoiseach attended the funeral of Mayo-born Maeve Barrett, the mother of his partner, Matt, after she died in Cork’s…