Unfortunately, nature abhors a vaccuum.
Americans are at a birth rate below replacement rate. In other words, the absolute population of American citizens is already dropping fast.
Mexicans are drawn by this depopulation birth rate like moths to a candle. The fact that we feed, clothe, and provide free med care to the moths is not helping the situation.
However, Bush knows that a contracting population base equals economic stagnation and recession. He doesn't want that. He also knows exactly what was discussed in this regard at Davos.
Thus his mexigrant plan.
I guess he doesn't because he's sending as many jobs to the one-child Chinese who now have the worlds' fastest growing economy. The Chinese are actually doing quite a lot better than the Mexicans who are breeding faster than anyone. If just having a fast growing population was the factor, Mexico shouldn't be the disaster it is. It's fastest growing cities are skyrocketing in crime, they're being murdered almost faster than they can reproduce. I don't know but I would imagine Chinese cities have far less crime and better conditions.
I'm for large families --- the larger the better, but only those people who can feed and clothe their own children and properly educate their children. That usually means solid families which isn't where the extreme population growth is in Mexico --- there the educated middle class tends to have smaller families. The poor are just bringing child after child into poverty, abandoning many to the streets to fend for themselves at very young ages.
I'm not sure where you got your numbers, but they are not correct. The US is the only industrialized nation with a birth rate that is above the replacement rate of 2.1 children per couple (although not by much). We were well below 2.0 for awhile in the 70's, but it has increased over the past two decades.
What is surprising is that much of the third world is rapidly approaching their replacment rate, and the trends indicate that world population may peak fairly soon and decline at an accelerating rate with unpredictable consequences (what happens land values when nobody is around to buy it?).
Regarding your comment about Mexicans: they are drawn to our jobs. I don't think they know or care what the birth rate is in the US and we should be happy they are here (as long as they're here legally and hold a job). The majority are hard workers and only looking for a better life, just like our ancestors, right? By the way, did you know that the fertility rate in Mexico is already at or below their replacment rate and falling, not rising? Mexico's population is still climbing fairly rapidly because of 'inertia' as women remain in their child bearing years for several decades, but this is a temporary situation unless their ferility rate increases soon. Ditto for much of the third world.
All of this may be good for the US as these immigrants will pay into the Social Security system, pension funds, etc., to support YOUR retirement, no?? Read Ben Wattenberg when you get a chance.