Should we require an intelligence test to vote?

 There are multiple links on Google search (or whatever your search engine is) that asks the question: Should passing an intelligence or IQ test be required to vote? 

Ideally not. But when the truly ignorant, bigoted, and ill-informed can vote, what does that say about our ability to vote wisely?

Consider: The senior, who is barely able to still contemplate the world around him or her, being coerced by their kids to vote a certain way. 

Consider: A uneducated poor rural family, who have limited access to the internet or news other than Fox.

Consider: A tribe that gets told how to vote by their local leader, or an urban slum resident who lacks a highschool education but is "taught" how to vote by his or her local activist.

Consider: The bigot, who has made no bones about his or her feelings about those different from themselves.

I have read opinions both in favor of and against this idea. Because ONCE you start down this slippery slope, who ELSE will be denied a vote? Already moves are under way to make voting harder for minorities or those without "proper" IDs. 

Now imagine asking people to be informed or intelligent to vote. BUT AGAIN, why not? We need to know how to drive to get a driver's license, right? Yeah but, we can also be as dumb as doorknobs to have kids and no one can say different. Same, apparently, for voting.

SO the question remains: Should we require that voters at least have some level of knowledge, learning, and intelligence to vote?