On May 4, some of the almost 200 excluded major party candidates filed a lawsuit in U.S. District Court to seek relief. They were excluded from Democratic and Republican Party primary ballots. The primary is June 12. Also, some South Carolina legislators will try to rush through a bill to give some relief, that would take effect immediately.
Two days ago, the South Carolina Supreme Court removed the candidates, over paperwork. See this story. The mention of the federal lawsuit is at the end of the story.