Teens' attitudes run counter to voter apathy By Hunter McDowell, 15, Michelle Brackney, 18In last year's presidential election, just more than 50 percent of registered voters in Marion County actually cast votes. Among them were 1,050 area 18-year-olds, including Doug Singleton and Matt Holbreich from North Central High School. Both teens have been involved in government-related activities, such as Indiana Boys State, and draw their political influences from a variety of sources. For H