The following audio excerpts are courtesy of Nonesuch Records. Nixon in China recorded by the Orchestra of  St. Luke’s conducted by Edo de Waart:

Nixon in China: “News, News, News”/James Maddalena (Richard Nixon); Nixon in China: “Cheers"/James Maddalena (Richard Nixon).

The following audio excerpt is courtesy of Dutch National Opera and Opus Arte. Doctor Atomic recorded by the Netherlands Philharmonic Orchestra conducted by Lawrence Renes:

Doctor Atomic: “Batter My Heart"/Gerald Finley (J. Robert Oppenheimer).