This is a chart generated from Propublica showing GDP growth if America allowed 10 million immigrants per year - this would result in almost an additional 70 billion dollars to the US economy vs current levels and a GDP growth rate of 4.5% vs our current growth rate of 2%.
"Over the past two decades, most efforts to estimate the fiscal impact of immigration in the United States have concluded that, in aggregate and over the long term, tax revenues of all types generated by immigrants—both legal and unauthorized—exceed the cost of the services they use." Congressional Budget Office
Illegal immigrants currently make America at least $11.64 billion. If we allowed an easy path to legal immigration status (which DOES NOT currently exist), it would earn us at least $2.12 billion more Institute on Taxation and Economic Policy
"While a small percentage of native-born Americans may be harmed... vastly more Americans benefit from the contributions that immigrants make to our economy" The Hill