FILE - A vote here sign is seen outside a polling place during the South Carolina primary, Saturday, Feb. 29, 2020, in Columbia, S.C. Months after the Democratic Party approved President Joe Biden's plan to overhaul its primary order to better reflect a deeply diverse voter base, implementing the revamped order has proven anything but simple. Party officials now expect the process to continue through the end of the year — even as the 2024 presidential race heats up all around it. (AP Photo/Matt Rourke, File)