Do you think that Mentally Challenged people should be allowed to vote? why/why not?

Ideally, I could see circumstances where some people shouldn't get to vote, but practically, I think the answer is yes, unless a court has ruled on a particular person, which is pretty impractical.

I've heard the arguments for poll tests, and I'd rather err on letting people vote than putting up systemic obstacles, or giving pure "originalists" more chances to revisit Jim Crow type precedents in this context.