When he won in November 2020, US President Joe Biden declared that America was back. Yet the world's oldest democracy seems to be in a serious existential crisis. Last May, the holding of the annual convention of the main gun lobby (the NRA) in the aftermath of the shooting at Uvalde primary schools shocked many Americans. In this tense context, nothing prevents Donald Trump from running again for president in 2024. What will happen if the Republicans, who are still largely behind him, win the mid-term legislative elections, scheduled for 8 November?