I got the following from the editors of American Federalist Journal:

Mr. Derbyshire—Deport 12 million illegals? We already are, over time:
In 2004, in summary:
* DHS apprehended an estimated 1,241,089 foreign
nationals. Ninety-two percent were natives of Mexico.
* There were 58,727 investigations initiated and
46,656 closed for immigration related activities
including crime, compliance enforcement, work site
enforcement, identity and benefit fraud, alien
smuggling, and counter terrorism.
* ICE detained approximately 235,247 foreign nationals
for a minimum of 24 hours.
* There were 202,842 foreign nationals formally
removed from the United States. The leading countries
of origin of formal removals were Mexico (73 percent),
Guatemala (4.1 percent) and Honduras (4.0 percent).
More than 1,035,000 other foreign nationals accepted
an offer of voluntary departure.
* Expedited removals accounted for 41,752 or 21
per-cent of all formal removals.
* DHS removed 88,897 criminal aliens from the United
States. The majority of criminal aliens (68,771 or 77
percent) were from Mexico.
At that rate, 12 million people would be removed in a
decade. Hardly “nuts”. The key of course is stopping
the inflow.