Lyndon Johnson actually said...

When the earliest settlers poured into a wild continent there was no one to ask them where they came from.

Remarks at the Signing of the Immigration Bill, Liberty Island, New York

10/02/1965

More Lyndon Johnson Quotes

The land and water conservation bill assures our growing population that we will begin, as of this day, to acquire on a pay-as-you-go basis ...

The wilderness bill preserves for our posterity, for all time to come, 9 million acres of this vast continent in their original and unchangi...

I believe the significance of this occasion goes far beyond these bills alone.

My regret at your leaving is tempered by satisfaction in the knowledge that you intend to continue your service to your country.