This undated photo provided by The University of Chicago Press shows an illustration from a page of the satirical adult coloring book "Doodling for Academics" by author Julie Schumacher, a professor at the University of Minnesota. Schumacher won the Thurber Prize for American Humor in 2015 for her comic novel, "Dear Committee Members." (Lauren Nassef/The University of Chicago Press via AP)
This undated photo provided by The University of Chicago Press shows an illustration from a page of the satirical adult coloring book "Doodling for Academics" by author Julie Schumacher, a professor at the University of Minnesota. Schumacher won the Thurber Prize for American Humor in 2015 for her comic novel, "Dear Committee Members." (Lauren Nassef/The University of Chicago Press via AP)
This undated photo provided by The University of Chicago Press shows the illustrated cover of the satirical adult coloring book "Doodling for Academics" by author Julie Schumacher, a professor at the University of Minnesota. Schumacher won the Thurber Prize for American Humor in 2015 for her comic novel, "Dear Committee Members." (Lauren Nassef/The University of Chicago Press via AP)
Sen. Rand Paul, R-Ky., speaks during an event at the University of Chicago's Ida Noyes Hall in Chicago on Tuesday, April 22, 2014. (AP Photo/Andrew A. Nelles)
Los Angeles Mayor Eric Garcetti right, Chicago Mayor Rahm Emanuel second right, Atlanta Mayor Kasim Reed center, New York Mayor Bill De Blasio second from left, and former Obama advisor and moderator of the discussion David Axlerod right, during a panel discussion about the issues facing the nation's big cities at the University of Chicago, in Chicago, Thursday, March, 6, 2014. (AP Photo/Paul Beaty)
Chicago Mayor Rahm Emanuel left, jokes with Los Angeles Mayor Eric Garcetti right, during a panel discussion about the issues facing the nation's big cities at the University of Chicago, in Chicago, Thursday, March, 6, 2014. (AP Photo/Paul Beaty)
Los Angeles Mayor Eric Garcetti right, jokes with Chicago Mayor Rahm Emanuel second form right, while Atlanta Mayor Kasim Reed looks on during a panel discussion about the issues facing the nation's big cities at the University of Chicago, in Chicago, Thursday, March, 6, 2014. (AP Photo/Paul Beaty)