If you are bothered by the source I used for the testimony, here is the testiomony at the Judiciary Committee website.
You can argue all you want but it is clear to anyone with a brain that a large pool of illigal alien labor has driven down wages for citizens in the US - starting with the poorest and now working up into middle class. This is simply a product of natural economic laws of supply and demand.
I am not going to argue with you. I took the trouble to read through your recent posting history and can see that you can become argumenative, so I will go ahead and tell you no - I will not provide links to back up my statement that the pool of illegal alien workers has driven down wages.
In reading some of your previous posts it also appeared to me that you favor a fairly unrestriced flow across the southern border.
Before I go outside and mow my lawn (yes - I still do my own yardwork) I'll go ahead and tell you my main concerns are cultural - not economic. I look at the economic prosperity of the US, and compare it to the poverty of Mexico. Mexico probably has more natural resources per capita that we here in the US, yet Mexico is mired in poverty.
It is clear to me that the reason for this disparity is cultural. We have our culture and Mexico has its culture. Everything about the USA and Mexico, along with El Salvador and Guatemala and the Honduras, are products of our respective cultures. I don't want our national culture blended with these national other cultures. We have enough bad cultural problems of our own without importing more.
I am very sympathetic for the poor in Mexico and Central America (If I were born down there I would probably be trying to move to the USA also). I have no problem with immigrants per se (I was married at one time to a child of immigrants), but I don't want their cultures to take root here. The only way this can be prevented is for immigration to be limited and controlled.