I know some worry immigration will change the very fabric of who we are, or take our jobs, or stick it to middle-class families at a time when they already feel like they've gotten the raw deal for over a decade. I hear these concerns. But that's not what these steps would do. Our history and the facts show that immigrants are a net plus for our economy and our society. And I believe it's important that all of us have this debate without impugning each other's character.