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As a socialist moving up in the Democratic presidential polls, Bernie Sanders raises the expectations of many on the left. Some assume Sanders believes what they believe and are disappointed if they discover he does not. In a newly-published interview, Vox founder Ezra Klein, an advocate of an open-borders immigration policy, asked a question virtually inviting Sanders to agree with Klein about allowing any and all would-be immigrants to come to the United States. Sanders most emphatically did not go along:

Klein: You said being a democratic socialist means a more international view. I think if you take global poverty that seriously, it leads you to conclusions that in the US are considered out of political bounds. Things like sharply raising the level of immigration we permit, even up to a level of open borders. About sharply increasing…

Sanders: Open borders? No, that's a Koch brothers proposal.

Klein: Really?

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