"At least" is right. It's closer to 30 years. It started slowly in the 60s, picked up steam in the 70s, the 80s brought us the "one time only" amnesty, and the 90s were even worse. This has to stop.
I'll again ask the questions I've been asking for years: if our own government is selective about which laws it chooses to ignore, why can't we mere citizens have the same right?
And if others can break the law by coming here illegally and enjoy the "instant" benefits of American citizenship, what is the real value of our citizenship in the first place? With the arrival of every illegal alien our scofflaw "justice" system chooses to ignore, the value of every citizen's birthright is diluted.