Ben Bagdikian has written a very important book called The Media Monopoly - Bernie Sanders

Open borders? [...] That's a right-wing proposal, which says essentially there is no United States. [...] It would make everybody in America poorer. You're doing away with the concept of a nation state, and I don't think there's any country in the world that believes in that. If you believe in a country called the United States or any other country, you have an obligation to do everything we can to help poor people. What right-wing people in this country would love is an open-border policy. Bring in all kinds of people, work for $2 or $3 an hour, that would be great for them. I don't believe in that. I think we have to raise wages in this country, I think we have to do everything we can to create millions of jobs.

Enough is enough. In March, we had a historic vote in both houses of Congress to end U.S. military involvement in Yemen’s civil war. This vote demonstrated strong bipartisan concern over unconstitutional and unauthorized wars, and it served as an important reminder that Congress must reassert its constitutional authority over the use of military force. I was one of those who opposed the Iraq war. Trump claims he opposed it too, but, in truth, he only did so after the fact. Trump campaigned on getting the United States out of "endless war," but his administration is taking us down a path that makes another war more likely. We can and we must pursue a different option. The American people don’t want endless war. Neither do we want a foreign policy that is based on the logic that led to those wars and corroded our democracy: a logic that privileges military tools over diplomatic ones, aggressive unilateralism over multilateral engagement, and acquiescence to our undemocratic partners over the pursuit of core interests alongside democratic allies who truly share our values. We have to view the terrorism threat through the proper scope, rather than allowing it to dominate our view of the world. The time has come to envision a new form of American engagement: one in which the United States leads not in war-making but in bringing people together to find shared solutions to our shared concerns. American power should be measured not by our ability to blow things up, but by our ability to build on our common humanity, harnessing our technology and enormous wealth to create a better life for all people.

I learned a great deal about immigration as a child because my father came from Poland at the age of 17, without a nickel in his pocket, without knowing one word of English. He came to the United States to escape the crushing poverty that existed in his community, and to escape widespread anti-Semitism. And, it was a good thing that he came to this country because virtually his entire family was wiped out by Hitler and Nazi barbarism... The underlying principles of our government will not be racism, sexism, xenophobia, homophobia, and religious bigotry. I did not come from a family that taught me to build a corporate empire through housing discrimination. I protested housing discrimination, was arrested for protesting school segregation, and one of the proudest days of my life was attending the March on Washington for jobs and freedom led by Dr. Martin Luther King Jr.