An election poster for Kais Saied is pasted on a wall along a street in Ariana, Tunisia, on September 29, 2024, during the presidential election campaign. (Photo by Chedly Ben Ibrahim/NurPhoto via Getty Images.)In July 2021, Tunisia’s president, Kais Saied, dismissed his prime minister, suspended parliament, and began ruling by decree. The country that had been the lone democratic success of the Arab Spring—the same country that had produced a N…