"Blaming immigrants for the job slowdown is barking up the wrong tree in a forest of many other causes."
So an increased supply of low wage labor doesn't depress the price of such labor? Think again. Remove welfare and you will find many more folks ready to work - even in jobs which require hard physical labor. I myself took time off from my job to work on my father in laws farm for harvest 4 years ago and I am 48 years old.