Then How Have the Democrats Won?

New Jersey has an inane ballot question that reads:

_ Revise language outlining when voting rights can be denied by deleting from the state Constitution the phrase "idiot or insane person" and replacing it with the phrase "person who has been adjudicated by a court of competent jurisdiction to lack the capacity to understand the act of voting."

I have one question on this: If it was against the law for "idiot [s] or insane person[s]" to vote prior to now, how come New Jersey is such a Democratic state? Not only do they have dead people voting in violation of state law, they also had idiots committing felonies as as well.