Each wave of immigrants that ...

Each wave of immigrants that have come in have been able to assimilate, integrate and then rise up and become part of this great American Dream.
Each wave of immigrants that have come in have been able to assimilate, integrate and then rise up and become part of this great American Dream.

Quotes from the same author

Here at home, we will strengthen our defenses but not succumb to a siege mentality that sacrifices the open society and liberties and values that we cherish as Americans, because great and proud nations don't hunker down and hide behind walls of suspicion and mistrust.
Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.
No party has a monopoly on wisdom. No democracy works without compromise.
If you're walking down the right path and you're willing to keep walking, eventually you'll make progress.
Focusing your life solely on making a buck shows a poverty of ambition. It asks too little of yourself. And it will leave you unfulfilled.