Where in the Constitution does it specify the eligibility requirements for citizens to vote for the President? You know, age, sex, property owned, stuff like that...
(Insert Jeopardy music...)
Okay, pencils down.
Which of you answered "It doesn't"? You all get A's. It just says that the states will send electors who will cast their votes; the federal Constitution says nothing about how the states will choose their electors.