About two days ago, Freedom 250, the Trump-backed public-private partnership that intends to celebrate the 250th birthday of the United States in lavish form, announced the lineup for the Great American State Fair, a series of concerts on the National Mall. Moments after that unveiling, the series was the subject of a whole lot of jokes because so many of the acts are '90s hitmakers who aren't taken very seriously. Since then, there's been an avalanche effect, with most of the artists dropping off and a few reaffirming their commitment to perform. And then there's Flo Rida, the biggest artist of the bunch and the only one who hasn't said anything. Everyone else is talking. Morris Day & The Time were the first act to drop off the Freedom 250 lineup , just hours after it was announced, and they were not the last . Young MC, Martina McBride, Bret Michaels, and the Commodores all followed Morris Day, dropping off the lineup. Vanilla Ice, by contrast, said that he's absolutely playing the shows.…