If I remember correctly Bill Clinton said in his state of the union address of 2000 that in order to make a more perfect union that the whites were bound to become a minority in the entirety of the USA as they would soon be in California.
That has been the big hang up with border policy and immigration.
The current peace in the USA is got at the price of promising the darker races that one day the USA will be theirs.
If border policy were changed it would put in doubt this promise.
That's why Clinton should take the African's offer for Clelsea's hand in marriage.
If the following portion of his speech is what you're referring to, Ol' Slick 'n' Slimy didn't come right out and put it that way.
He said that in less than 50 years (now 45 years) there would be no one majority in the U.S. and, of course, good old California is leading the way. He also prattled on about celebrating diversity, blah, blah, blah.
Within 10 years -- just 10 years -- there will be no majority race in our largest state of California. In a little more than 50 years, there will be no majority race in America. In a more interconnected world, this diversity can be our greatest strength. Just look around this chamber. Look around. We have members in this Congress from virtually every racial, ethnic, and religious background. And I think you would agree that America is stronger because of it.snip
[M]odern science has confirmed what ancient faiths has always taught: the most important fact of life is our common humanity. Therefore, we should do more than just tolerate our diversity -- we should honor it and celebrate it.
snip