Nope. Much earlier. The Immigration and Nationality Act of 1965.
Senator Ted Kennedy leading the Democrats told America, "We've got a plan. We're going to close the door to European immigration and roll out the red carpet to Third World immigration. Don't worry. You won't notice it at first but wait 50 years. You won't even recognize the place! Oh, by the way, all these people we're bringing over? They'll all vote Democratic."
And the GOP said, "Sounds great! The people who give us a lot of money like cheap gardeners and construction workers!"
The "fundamental transformation" started a long time before November 4, 2008. That was just the day when we could finally see it.
You are correct. Thank you for reminding me of that. I had forgotten about it.