Oregon Gov. Kate Brown smiles after signing an automatic voter registration bill on Monday in Salem, Ore. Seventeen years after Oregon decided to become the first state in the nation to hold all elections by mail ballot, it is taking another pioneering step to encourage more people to cast ballots, by automatically registering them to vote. Don Ryan/AP hide caption

itoggle caption Don Ryan/AP

Voters crowd into their polling place Aug. 15 at Keonepoko Elementary School in Pahoa, Hawaii. Marco Garcia/AP hide caption

itoggle caption Marco Garcia/AP