 Registered voters can cast their ballots for Republican and Democratic primaries in numerous state and federal races in the run-up to the August 13th primary. Secretary of State Steve Simon says voters can vote early in person or request a ballot through the mail. And the rule in Minnesota is it's got to get back either by mail or by hand delivery or by carrier pigeon or whatever the means. It's got to get back by 8 p.m., by the close of the polls.