In that respect, Obama is doing better than the Cato Institute. But NumbersUSA points out that Senator Obama knew even better in 2006:dug it up and quoted it:
Preview #SOTU: "Immigrants aren’t the reason wages haven’t gone up enough". But he said "principal reason". Even Obama knows it's *a* reason— Mark Krikorian (@MarkSKrikorian) January 13, 2016
“[T]here’s no denying that many blacks share the same anxieties as many whites about the wave of illegal immigration flooding our Southern border—a sense that what’s happening now is fundamentally different from what has gone on before,” then-Senator Obama wrote in his 2006 autobiography, “The Audacity of Hope: Thoughts on Reclaiming the American Dream.””Not all these fears are irrational,” he wrote.“The number of immigrants added to the labor force every year is of a magnitude not seen in this country for over a century,” Obama noted. “If this huge influx of mostly low-skill workers provides some benefits to the economy as a whole—especially by keeping our workforce young, in contrast to an increasingly geriatric Europe and Japan—it also threatens to depress further the wages of blue-collar Americans and put strains on an already overburdened safety net.”Right, he just forgot to say "When I'm elected, I'll make it much, much worse."