[Know your rights]

the $800 Billion that illegal immigrants contribute to the GDP

Gross Domestic Product = Consumer Spending + Business and Residential Investment + Government Spending - Trade Deficit.

I can believe that illegal aliens "contribute" several hundred billions of dollars to the costs incurred by government. Oddly, I don't feel grateful.

[WilliamofCarmichael]

From the source referenced by bayourod Raul Hinojosa says, "The total goods and services that they consume through their paycheck, plus all that they produce for their employers, is close to about $800 billion."

A little bit of imitating whirling dervishes?

The industries most dependent upon ILLEGAL immigrant, government-subsidized "cheap" labor did about $800 billion. I bet is the truth. They were before the millions and millions came and they will be there after the millions and millions go home. I bet.

I will defer to others however with an explanation and some hint of a source.

According to BEA 2003 Gross Output by Industry in Current Dollars (total = $19,732.8 billion)

agriculture (farms) was $223.8 Billion

Accommodation and food services $549.1 Billion

Total = $772.9 Billion

Note:

construction was $954.8B but there was no break out for residential, etc.

Other services, except government was $472.2B but there was no break out, etc.