(CNN)When Nathaniel Batchelder, a 28-year-old who has autism, voted Thursday in the midterm elections, "we were on such a high," said his mother, Susan Senator.
Mother's booklet for son with autism: 'Voting is really important. Here's how to do it.'
Batchelder has "a pretty severe developmental disability and a lot of anxiety and communication issues, but he's very eager to learn everything about the world," said Senator, who has written books about autism and lives in the Boston area.
But had he lived somewhere else -- in a state where laws place tighter voting restrictions based on "mental competence" -- he might not have been able to cast his ballot at all, experts say.
Senator knew that she needed to come up with a way to make things as smooth as possible for her son. Batchelder voted for the first time in 2016, but when he voted in this year's primaries, he felt anxious and rushed. He went through a couple of ballots before he was able to fill one out properly.
So Senator created a booklet for her son titled "Voting is really important. Here's how to do it."