The church’s new position on the death penalty carries no formal punishment for defying it, but in eliminating any ambiguity it does compel Catholic officials at least to find concrete reasons to not abide by it. Four Supreme Court justices are Catholic, as is Brett Kavanaugh, President Trump’s nominee for the court; among governors, Pete Ricketts of Nebraska, a Catholic and staunch supporter of the death penalty, has already declared that he will not block an execution scheduled for this month.