NPR Public Editor

Scientific American reported last week on the US Food and Drug Administration's past use of what are known as "close-hold" embargoes. Andrew Harnik/AP hide caption

Democratic presidential candidate Hillary Clinton waves as she walks from her daughter's apartment building Sept. 11, 2016, in New York. Clinton unexpectedly left the 9/11 anniversary ceremony. Her campaign later announced she had been diagnosed with pneumonia. Craig Ruttle/AP hide caption

The rise of a young Donald Trump was explored in the NPR special, The Making Of Clinton and Trump. Mark Lennihan/ASSOCIATED PRESS hide caption

Cokie Roberts talks to George Stephanopoulos, on ABC's "Good Morning America" in 2015. Fred Lee/ABC via Getty Images hide caption

Libertarian presidential candidate Gary Johnson speaks during a campaign rally Sept. 3, 2016, in Des Moines, Iowa. Scott Morgan/AP hide caption

Democratic presidential candidate Hillary Clinton reacts while greeting supporters after giving a speech on the economy at Futuramic Tool & Engineering, in Warren, Mich., on Aug. 11. Andrew Harnik/AP hide caption

Khizr Khan, father of fallen US Army Capt. Humayun S. M. Khan, speaks during the final day of the 2016 Democratic National Convention, as his wife listens. Since, then Khan has openly feuded with Donald Trump in the media. J. Scott Applewhite/AP hide caption

Hillary Clinton attends church with daughter Chelsea Clinton at the Greater Mount Carmel Missionary Baptist Church in St. Louis, Missouri while on the campaign trail in 2008. Justin Sullivan/Getty Images hide caption

Former Ku Klux Klan leader David Duke talks to the media in Baton Rouge, La., on July 22, 2016, after registering to run for the U.S. Senate. Max Becherer/AP hide caption

Democratic presidential candidate Hillary Clinton and Democratic vice presidential candidate, Sen. Tim Kaine, wave to members of the audience as they stand on stage during the fourth day session of the Democratic National Convention. Andrew Harnik/AP hide caption