In The Politics of Autism, I write: "Support from the general public will be an important political asset for autistic people. Another will be their sheer numbers, since a larger population of identified autistic adults will mean more autistic voters and activists."
Andrew Pulrang at Forbes has a recommendation for survey organizations:
Include questions about disability and disability issues in standard political polling. There has been some valuable work on disabled people’s voting patterns over the last few election cycles, particularly from Rutgers University and Pew Research. But we would understand a lot more if all political and opinion polls would measure disability along with race, age, gender, and other demographic categories. Over time this would also prompt more people with disabilities to think about how their disabilities might shape their political identity and voting decisions.