Graduation day at Brooklyn College in New York City was marked by confetti guns blasting thousands of scraps of yellow paper over the heads of the 4,000 graduates, symbolically transforming them from students into alumni. “We go to the real world now,” said Benash Khanu, a psychology major who is looking to land her first job. “It’s scary, but it’s life.” The commencement speaker was a man whom many Brooklyn students had championed in his quest to become president — Vermont Senator Bernie Sanders. In his address to the students, Sanders imparted what he called a “simple” message: “Think big, not small, and help us create the nation we all know we can become.” Entering a “hot mess” Students graduating across the United States this spring entered secondary school at the beginning of the eight-year presidency of Barack Obama, a relatively youthful figure at the time whose rhetoric about tolerance, …