[Fatalis]

The estimated number of illegal aliens already here is closer to 31 million.

Estimated by whom?

Per Bob Shieffer at the last Presidential debate, some 8,000 illegal aliens per week are crossing the border. That equates to more like 4.16 million new illegals per year.

That assumes each illegal alien crosses only once.

[TomGuy]

Analysis: 11 million illegals in the United States

Note that this article is dated 2001. If some 4 million new per year have been added, just based on this article, the number NOW would add another 16 million, for a total of 27 million.