Almost two weeks ago, I speculated on Fox News Sunday that Mitt Romney would announce his vice presidential pick early next week, on August 6 or 7. It was, if I may say, a reasonably well-informed forecast at the time. But I didn’t take into account the existence and importance of the redoubtable Rafalca, the Romneys’ equestrian Olympian, who’s apparently made it to the final dressage round on August 7 in London.