As Democrats across the country make an election-year push to raise the minimum wage, they often point to fast-food workers, baristas and others who are struggling to raise families, pay rent or get through school — some on as little as $7.25 per hour. First, though, they are out to help themselves. Looking to motivate younger people, minorities and others in their base to go to the polls on Nov. 4, the party has put questions on the ballot in five states asking voters whether the minimum wage should be …