Why did the convention system need reformed in the early the century?

The convention system needed reform in the early 20th century due to increasing public dissatisfaction with the party-controlled process that often excluded ordinary voters from participating in candidate selection. This led to concerns about corruption, party bosses, and a lack of accountability. The push for reforms, such as the direct primary, aimed to enhance democratic participation, ensure more transparent candidate selection, and empower voters in the political process. Ultimately, these changes sought to create a more responsive and representative electoral system.