And if deceptive claims on social media aren’t proof enough, President Trump was only too happy to restate many of them in his rambling pre-cabinet meeting chat with reporters Wednesday during which he made a misleading comparison with the Vatican City walls, claimed there were 30-35 million undocumented immigrants in the United States costing the government “$250 billion” annually and that former President Barack Obama built a formidable wall around his “compound” in Washington. For the record, Vatican City is not closed off by walls (anyone can walk into St. Peter’s Square), and of the sections that stand today, many date to the ninth century. The best estimate of undocumented immigrants in the U.S. is around 11 million. As to what that “costs,” estimates vary wildly, but the most pessimistic peg it at $116 billion a year, though that is hotly disputed. And Mr. Obama doesn’t have a “10-foot wall” around his house in Northwest D.C. — he has a combination of a low-rise retaining wall and iron and chain link fencing, The New York Times has dutifully reported.