I would like to think a candidate swap after the primary VOTE would be totally destructive to the party. But I don't really think there are enough functioning brain cells to care. I think the drones will look for the proverbial blue column and check all.

As to if that will help or harm the DNC in their attempt to win the election, I don't think it will make any difference. That is unless there are enough people who would normally sit this election out but suddenly choose to vote a couple of vajajays into the white house because of sexist reasons.