The 'Mandela effect' and the science of false memories

There's a theory doing the rounds online that nuclear research experiments caused the world to shift into an alternate reality where Donald Trump became president. This might sound stupid, but some people genuinely believe it to be true. And to back up their theory they cite the "Mandela effect," a phenomenon that supposedly occurs when large groups of people believe something happened even though evidence shows it isn't true.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/the-mandela-effect-and-the-science-of-false-memories