Colorado Democrats pack a gym at a Denver high school during caucuses on March 1, 2016. The crowds and long lines have led to calls for the state to move to an open primary system.
Marc Piscotty/Getty Images
Syrian refugees at a makeshift camp on the Greek-Macedonian border, near the northern Greek village of Idomeni, on May 26. President Obama wants to bring 10,000 Syrian refugees to the U.S. this year. Donald Trump, the presumptive Republican presidential nominee, says there's a "tremendous flow" of Syrian refugees coming into the U.S. and the program should be suspended.
Eight months pregnant, Mara Torres stands next to a mosquito net placed over her bed in Cali, Colombia. Health officials in Cali have delivered mosquito nets to pregnant women to help protect them from the bites of mosquitoes that can transmit dengue, chikungunya or Zika.
Luis Robayo /AFP/Getty Images
Democratic presidential candidate Bernie Sanders speaks during a rally in Washington, D.C., on June 9. Although he didn't win the nomination, Sanders' grass-roots fundraising has broken records.
Alex Wong/Getty Images
Merrick Garland, President Obama's choice to fill the Supreme Court vacancy, spoke at the graduation ceremony for J.O. Wilson Elementary School, where he has tutored students for nearly two decades.