"We must try as best we can to balance isolation and engagement, pressure and incentives, so that human rights and dignity are advanced over time," Obama said five years ago, accepting the Nobel Peace Prize. Mark Wilson/Getty Images hide caption

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Makenzie Vasquez (from left), Pamala Hunt, Latonya Suggs, Ann Bowers, Nathan Hornes, Ashlee Schmidt, Natasha Hornes, Tasha Courtright, Michael Adorno and Sarah Dieffenbacher are refusing to pay back loans they took out to attend Corinthian Colleges. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Former Florida Gov. Jeb Bush is one of four "un-candidates" being targeted by liberal groups Campaign Legal Center and Democracy 21. They say the politicians have crossed the line into candidacy based on their activities in recent months. Scott Olson/Getty Images hide caption

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