A voter casting a ballot in Louisville, Ky. this month. Long-serving election officials around the country are retiring ahead of the 2020 election, which could be among the most challenging to administer in the country’s history.

A voter casting a ballot in Louisville, Ky. this month. Long-serving election officials around the country are retiring ahead of the 2020 election, which could be among the most challenging to administer in the country’s history.