Several hundred protesters picket the opening night of the Metropolitan Opera season at Lincoln Center, Sept. 22, 2014. "You will be made to destroy that set," Jeffrey Wiesenfeld said. John Moore/Getty Images hide caption

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James Conion leads the Cincinnati Symphony Orchestra and Chorus at Carnegie Hall in New York, NY on May 09, 2014. Melanie Burford/Prime/Melanie Burford/Prime for NPR hide caption

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David Robertson, a passionate champion of new music, conducts the St. Louis Symphony Orchestra on tour in Berlin. Dilip Vishwanat/St. Louis Symphony hide caption

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Michael Tilson Thomas and the San Francisco Symphony, whose recording of music by John Adams made our Top 10 of 2012. Bill Swerbenski/courtesy of the artists hide caption

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Clockwise from upper left: Acid Pauli, Kendrick Lamar, Samuel Yirga, Kelan Philip Cohran, Waxahatchee, Pallbearer, Matthew Dear Courtesy of the artists hide caption

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With the presidential election set for Tuesday, we take a look at operas that tackle today's toughest political issues. Scott Olson/Getty Images hide caption

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The original production of John Adams' Nixon in China (at Houston Grand Opera) celebrates the 25-year mark. Jim Caldwell /Houston Grand Opera hide caption

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