A month resolves Yes if anyone, whether they are a citizen or not, is killed directly because of US election-related political violence during the month in question (EST). The location of the killing does have to be within the United States or its territories/waters, as the spirit of this market is about the degree of violence and chaos in the country caused by the approach and outcome of the 2024 presidential race.
A death that is related to politics but clearly not to the presidential election will not be sufficient for a Yes. ie., I would not count Green Peace killing an infamous whaler. I also would not count a nazi killing an antifa at a punk bar in Portland unless one of them said or did something in the incident framing it as about Trump's re-election or something similar.
On the other hand, a death that occured between election protestors and counter-protestors would be easy to resolve as Yes, as would any death amidst an insurrection, such as the shooting death that occured from the January 6th 2021 capital riot.
If there is ambiguity, a preponderance of framing by CNN, the BBC, and the Washington Post will be used. If someone is injured by political violence and dies days later from those injuries, I will resolve Yes for when they actually died.
If there is ongoing political violence in late January, I may add additional months. Please feel free to ask clarifying questions in the comments.
I assume the question is about Corey Comperatore:
https://en.wikipedia.org/wiki/Attempted_assassination_of_Donald_Trump#Victims
That would have been sufficient for a Yes. Even though the shooter's motives were murky, the apparent target selection of "whichever presidential candidate he could get a shot on" does make this "election-related political violence." Of course, I would always hear out people arguing for some kind of obvious contradiction that I missed!