HARRISBURG — Location, reputation, demographics, and pure luck may have mattered more than policy differences in Pennsylvania’s row office primary elections this week. Tuesday saw a major upset in the Democratic race for state treasurer and a decisive win in a crowded Democratic attorney general field by a candidate who brought statewide name recognition — but not much cash — to the race. With the fields settled for November’s marquee presidential and U.S. Senate races, turnout for the Democratic and Republican primaries was low, according to election administrators. The voters who did show up often said they felt unprepared and...