I thought the opera song at the end of the convention was a little odd, until my wife pointed out that it was the song at the ending of the movie. Sum of all Fears that was playing as retribution was carried out on the global operatives for trying to start WWIII.
https://www.google.com/search?q=sum+of+Ll+fears+opera+so+g&sca_esv=01bfd36583663989&sca_upv=1&source=hp&ei=xFeaZp-sGOvBp84Psp6ZyA4&oq=sum+of+Ll+fears+opera+so+g&gs_lp=EhFtb2JpbGUtZ3dzLXdpei1ocCIac3VtIG9mIExsIGZlYXJzIG9wZXJhIHNvIGcyBxAAGIAEGA0yBxAhGKABGAoyBxAhGKABGAoyBxAhGKABGAoyCBAAGAgYDRgeMggQABgIGA0YHjILEAAYgAQYhgMYigUyCxAAGIAEGIYDGIoFSIVIUIEJWMhFcAN4AJABAJgBdaABhxOqAQQxOS44uAEDyAEA-AEBmAIeoAKZFagCEcICAhApwgIQEAAYAxjlAhjqAhiMAxiPAcICEBAuGAMY5QIY6gIYjAMYjwHCAgsQLhiABBiRAhiKBcICERAuGIAEGLEDGNEDGIMBGMcBwgILEAAYgAQYsQMYgwHCAgUQABiABMICCxAuGIAEGNEDGMcBwgILEAAYgAQYkQIYigXCAgoQLhiABBhDGIoFwgIOEC4YgAQYxwEYjgUYrwHCAg4QLhiABBixAxiDARiKBcICCBAAGIAEGLEDwgIKEAAYgAQYQxiKBcICDhAuGIAEGJECGNQCGIoFwgIQEC4YgAQYsQMYQxiDARiKBcICDRAuGIAEGLEDGEMYigXCAg0QABiABBixAxhDGIoFwgIFECEYoAHCAgUQIRifBcICBRAhGKsCwgINEC4YgAQYsQMYgwEYDcICBxAuGIAEGA3CAgkQLhiABBgKGA3CAggQABgWGAoYHsICChAAGAgYDRgeGA_CAgYQABgWGB7CAggQABgWGB4YD8ICBxAhGAoYqwKYAw6SBwUyMC4xMKAHuIcC&sclient=mobile-gws-wiz-hp#fpstate=ive&vld=cid:a9224ad6,vid:-WlpLIA9P7c,st:0 (https://www.google.com/search?q=sum+of+Ll+fears+opera+so+g&sca_esv=01bfd36583663989&sca_upv=1&source=hp&ei=xFeaZp-sGOvBp84Psp6ZyA4&oq=sum+of+Ll+fears+opera+so+g&gs_lp=EhFtb2JpbGUtZ3dzLXdpei1ocCIac3VtIG9mIExsIGZlYXJzIG9wZXJhIHNvIGcyBxAAGIAEGA0yBxAhGKABGAoyBxAhGKABGAoyBxAhGKABGAoyCBAAGAgYDRgeMggQABgIGA0YHjILEAAYgAQYhgMYigUyCxAAGIAEGIYDGIoFSIVIUIEJWMhFcAN4AJABAJgBdaABhxOqAQQxOS44uAEDyAEA-AEBmAIeoAKZFagCEcICAhApwgIQEAAYAxjlAhjqAhiMAxiPAcICEBAuGAMY5QIY6gIYjAMYjwHCAgsQLhiABBiRAhiKBcICERAuGIAEGLEDGNEDGIMBGMcBwgILEAAYgAQYsQMYgwHCAgUQABiABMICCxAuGIAEGNEDGMcBwgILEAAYgAQYkQIYigXCAgoQLhiABBhDGIoFwgIOEC4YgAQYxwEYjgUYrwHCAg4QLhiABBixAxiDARiKBcICCBAAGIAEGLEDwgIKEAAYgAQYQxiKBcICDhAuGIAEGJECGNQCGIoFwgIQEC4YgAQYsQMYQxiDARiKBcICDRAuGIAEGLEDGEMYigXCAg0QABiABBixAxhDGIoFwgIFECEYoAHCAgUQIRifBcICBRAhGKsCwgINEC4YgAQYsQMYgwEYDcICBxAuGIAEGA3CAgkQLhiABBgKGA3CAggQABgWGAoYHsICChAAGAgYDRgeGA_CAgYQABgWGB7CAggQABgWGB4YD8ICBxAhGAoYqwKYAw6SBwUyMC4xMKAHuIcC&sclient=mobile-gws-wiz-hp#fpstate=ive&vld=cid:a9224ad6,vid:-WlpLIA9P7c,st:0)
https://www.sportskeeda.com/us/music/news-what-nessun-dorma-mean-the-internet-brings-light-ending-the-sum-all-fears-trump-features-song-rnc-24 (https://www.sportskeeda.com/us/music/news-what-nessun-dorma-mean-the-internet-brings-light-ending-the-sum-all-fears-trump-features-song-rnc-24)
"Nessun Dorma is played at the end of the film The Sum of All Fears, in which time ALL the traitors & Deep State Actors were executed... Trump is very specific about his songs... he played this for a reason.
The meaning of the song is "none shall sleep" probably will be appropriate!