On November 1, the Democratic National Committee and the state Democratic Parties of Georgia, Arizona, and Texas filed lawsuits against the law that determines order of candidates on the ballot. In all three states, the Republican nominee is listed first for 2020 because Republicans won the Governorship in the last election. See this story. Thanks to Rick Hasen for the link.
The Democratic Party is currently suing Florida over the same issue, and a decision could be released by a U.S. District Court at any time.