You are WRONG!
Elections are STATE issues!
Even though Congress and the Courts have intruded, to some degree, and to some harm, elections are primarily in STATE jurisdiction.
Notice how each State can decide, in the Primary, if it wants a Caucus or a Primary.
Notice how each State can decide how to award delegates, in a Primary.
Notice how each State can decide how to allocate Electors to the Electoral College. (Not all States use a “winner take all” system.)
ooops! I was talking about the QUALIFICATIONS to RUN FOR PRESIDENT! That is in our constitution, is it not? It is a FEDERAL LAW. Not a STATE law.