Students protest the rising costs of college loans in Los Angeles in 2012. Citing bank bailouts, the protesters called for student debt cancellations. David McNew/Getty Images hide caption

itoggle caption David McNew/Getty Images

Sen. Bernie Sanders, I-Vt., has gotten some of the biggest and most devoted crowds of the 2016 presidential race, including in Portland, Ore., this month, where he drew more than 19,000. Troy Wayrynen/AP hide caption

itoggle caption Troy Wayrynen/AP

Actress Melissa Gilbert arrives at the Award of Excellence Star presentation for the Screen Actors Guild in 2007. Gilbert is trying to win a congressional seat from Michigan, where her husband is from. Noel Vasquez/Getty Images hide caption

itoggle caption Noel Vasquez/Getty Images

President Obama speaks in Ethiopia. While there, he noted that in the U.S., presidents can't run for more than two terms. But if they could, he said, he'd win. Mulugeta Ayene/AP hide caption

itoggle caption Mulugeta Ayene/AP

A supporter waves a Cuban flag in front of the country's embassy after it reopened for the first time in 54 years on July 20 in Washington, D.C. The embassy was closed in 1961 when U.S. President Dwight Eisenhower severed diplomatic ties with the island nation after Fidel Castro took power in a communist revolution. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images

Former Virginia Sen. Jim Webb, who is running for president, speaks at the Urbandale Democrats' Flag Day celebration on June 14 in Urbandale, Iowa. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Republican presidential candidate and TV personality Donald Trump arrives by escalator to the tune of "Rockin' in the Free World." Musician Neil Young did not approve of his song choice. Brendan McDermid /Reuters/Landov hide caption

itoggle caption Brendan McDermid /Reuters/Landov

With less than two years left in his presidency, President Obama has been less scripted and appears less confined by politics. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images