Between 2000 and 2010, the Hispanic population grew by 15,171,776, accounting for 56 percent of the overall overall growth in the USA. There were 50,477,594 Hispanics as of April 1, 2010. The 10-year growth rate for Hispanics was 43 percent, compared to less than 5 percent for non-Hispanics.
There are 17,130,891 Hispanic children, accounting for 23.1 percent of the people in the USA under 18 years of age. Between 2000 to 2010, the number of Hispanic children grew by 4.8 million. (by comparison, the number of non-Hispanic White children shrank by 4.3 million) The demographics of children today are generally a very accurate reflection of what the future population will be.
The fertility rate for women of Hispanic origin was 97.5 live births per 1,000 women aged 15-44 years, which is 50 percent higher than the rate for non-Hispanic women. For women of Mexican origin the rate was 112.3 per 1,000. National Center for Health Statistics, most recent statistics collected in 1981 (for comparison, the average american female fertility rate in 1976 was only 29.6 ) This does not even take into account that hispanics have children at earlier ages. Just like compounding interest, even a slightly higher rate will cause huge differential effects after being compounded over time.
In 2011, 37.6 percent of the population of California was hispanic. As of 2010, according to the state Department of Education, 51 percent of students (3.1 million) are Hispanic. In only a single generation, the hispanics will have gone to making up 37.6 percent to 51 percent. It certainly is not a trivial matter to so drastically alter California's population, considering there are already more people in the state than the entire country of Canada! (as of 2010, Canada has 34,108,752 people, California has 36,961,664 ).

Should the potential of overpopulation be a concern?
http://india.indymedia.org/en/2005/01/210036.shtml
What could this potentially mean for the future of America?
http://www.globalpost.com/dispatch/india/100713/population-growth-sterilization-millennium-development-goals
The map in the following link shows the states where the majority of 5-year old children are non-white:
https://3697742252670029590-a-1802744773732722657-s-sites.googlegroups.com/site/displacedbyimmigrants/displacing-births-of-white-babies/majoritynonwhiteunder5.bmp?attachauth=ANoY7cpwDMVKWbpl7L7EiXxviKPn12atMORzWASm4N0Arx-Qd8jsv0_nNkEpvihstYt-xko_wA6NGECBOtuq6v8E-lOhvxOCHTRgMBV8Hhcn5J8LpBTF7I_8Nb1LtdjZ9rSgKEKWKOEK4NHhFmc6dSr7aLmG8c6xHNUod5hEZRYK_DqMCKfoWBl-N8EtrVhyiqDs9yyYsFADVV7i1BRviMIbbUCXBRRXLy13TjnIV_PtYQJtGlMdfzuxIt8C94Kfjsmc4B4Zq7GdJ2A66ZEFFU5zdcR3wBGFEQ%3D%3D&attredirects=0
With all these hispanics, will the United States become more like Mexico, with more unemployment, poverty, and crime?