Order all the 2024 House races by the Democrats' margin of victory (i.e. % D vote - % R vote). Which House race is the one that would give Democrats their 218th seat? In 2022, it was Iowa's 3rd Congressional District. See more: 

https://ballotpedia.org/Election_results,_2022:_Congressional_margin_of_victory_analysis

This market will resolve ignoring any resignations or deaths, purely based off the recorded election results.

Feel free to add your own answers, however they must be valid states that have not already been added.