Very strange way of phrasing it. Related to? Meaning he had a heart attack going up stairs?
For a group that large with a lot of older people in it, three deaths (I assume from heart attacks or similar) is not that unusual.
As for this one, I don’t know...but if it could have been pinned on Trump supporters, they would have done so by more than implication.
Story is that a rioter threw a fire extinguisher at him.