"Open borders?... That's a right-wing proposal, which essentially says there is no United States... You're doing away with the concept of a nation state, and I don't think any country in the world believes that."
––Bernie Sanders, July 2015, interview with Ezra Klein
"If we're gonna have a country, we need a border... You don't have a country without a border. You know, what's a country? How do you define a country if you don't have borders?"
––Donald Trump, June 2015, interview with Hugh Hewitt