House Speaker John Boehner gets emotional and wipes his face during a news conference on Capitol Hill in which he announced he would be resigning at the end of October. Steve Helber/AP hide caption

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Donald Trump speaks to the media at the U.S.-Mexico border in July. The Libre Initiative's letter doesn't call out any candidates by name, but Trump has called for mass deportation and an end to birthright citizenship for immigrants. LM Otero/AP hide caption

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Two teams face off over the motion, "Liberals Are Stifling Intellectual Diversity On Campus," at the latest Intelligence Squared U.S. debate. Chris Zarconi/Intelligence Squared U.S. hide caption

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Editors of the conservative Dartmouth Review, from left to right: Sterling Beard, 22, from Abilene, Texas, the Review's editor-in-chief; Benjamin Riley, 20, from New York City; Blake Neff, 21, from Sioux Falls, S.D. John W. Poole/NPR hide caption

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