This market will resolve to one of the three listed outcomes based on whether and how the Supreme Court of the United States rule on a case disputing the top-of-the-ticket outcome of the 2028 United States Presidential Election. The case must actually reach SCOTUS and get resolved in a manner somewhat legally analogous to the 2000 election case of Bush v. Gore. Obviously, that case was regarding the Florida Supreme Court's ongoing recount order, but this market doesn't require that exact type of scenario. It does require that the case has the direct theoretical potential to alter the outcome of the presidential election, one way or the other.

Bush v. Gore 2000 would have resolved "Yes, and the Republican side will win" because the recount could theoretically have swung the whole election if it had continued. Note that if it is truly ambiguous which way the ruling goes re: party favorability, then whichever party's candidate holds the office of the presidency on January 21st 2029 will be considered the "winner." A case which regards the election but does not credibly create a path to reverse or otherwise determine its outcome will not be considered for Yes, even if it is still very dramatic. Likewise for downballot cases, impeachment trials, or other legal cases launched by one part/candidate against the other.

In the event there are multiple overlapping cases that fit this market's criteria—each of them capable of swinging the election in a game theoretic nightmare—this market will resolve based on the one that is ruled on first, and I may create similar markets for the others. Feel free to ask questions in the comments, but keep in mind that I am not a lawyer, but am happy to hear them out if they have advice for edge cases!