The alleged shooter is just the fourth person in Western Pennsylvania to ever face a federal death penalty. None of other three were executed.
If jurors decide Bowers is guilty of the crimes he faces, they will then determine whether he spends the rest of his life in prison or be executed by lethal injection.
The trial threatens to broadcast the white supremacist ideas that lay behind the attack, and continue to pose risks for Jewish communities.
Lena Epstein, who was raised Jewish, made the comments at a candidate forum at a Baptist church in Holland, Michigan.