Disinformation poses an unprecedented threat to democracy in the United States in 2024, according to researchers, technologists and political scientists. As the presidential election approaches, experts warn that a convergence of events at home and abroad, on traditional and social media — and amid an environment of rising authoritarianism, deep distrust, and political and social unrest — makes the dangers from propaganda, falsehoods and conspiracy theories more dire than ever. The U.S. presidential election comes during a historic year, with billions of people voting in other elections in more than 50 countries, including in Europe, India, Mexico and South Africa....