Because there is no constitutional guarantee, every state in the country has different regulations about who is allowed to vote. But in many states, people with intellectual disabilities are denied the right to vote. Paul Collins, an English professor at Portland State University, wonders why his 25 year-old son with Autism Spectrum Disorder can’t vote … or can he? Collins explores this issue in a new article he wrote  for The Believer magazine. He joins us to talk about who votes and why it matters.