Are there 30 million illegals in the US?

Town Hall:

Tonight Ann Coulter shut down Fusion TV host Jorge Ramos when he tried to tell her the numbers in her new book, Adios America, were wrong. In the book, out on Monday, June 1, Coulter estimates that the number of undocumented immigrants in America is about 30 million—not 11 million, as Ramos insisted.

“The number we keep hearing is 11 million, 11 million, 11 million. That’s so weird! It’s been 11 million for a decade,” Coulter said. “I’m sorry, it defies common sense that in the last decade, not one more illegal alien has come.” Her 30 million figure, which she explains in detail in Adios America, comes from a Bear Stearns study of several factors, including school enrollment in illegal alien hotspots, housing permits in illegal alien hotspots, and remissions of money back to Mexico.
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Ramos tried to argue that America’s growing diversity is a good thing for the country. “What’s wrong with diversity?” he asked Coulter, who quickly pointed out that “when a third of all immigrants come from one country… it’s not more diverse. It’s more Mexican.”

She noted that a quarter of the Mexican population is here, and asked Ramos, “At what point will we have taken in enough? The entire Mexican population?”
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She should have suggested the annexation of Mexico.  That would give all the Mexicans US citizenship and allow the FBI to clean up all the corruption that drives people to leave the place to begin with.   The suggestion would be worth it just to see Jorge Ramos squirm.