If Biden is the Democratic Party nominee, this resolves N/A, otherwise resolves YES if the winner of the 2024 election is a Democrat or is nominated by the Democratic National Convention, NO if it's a Republican or third party. 

Basically, the goal of this market is to see whether the market thinks democrats would do better if Biden was not the nominee. This is inspired by one of 

Robin Hanson's ideas for conditional prediction markets

 where there would be a conditional market on a company's stock price if they fired their CEO. 