Brush up on Alinsky’s Rules For Radicals. We defeat them with their own methods.The fact that her descendant owned slaves is not something you can hold against her. It has nothing to do with her.
She's a terrible politician. You don't need to look in the past to find numerous reasons to not vote for her.
Put her in jail for the disastrous Afghanistan withdrawal that killed 13 US service members ... not because her ancestor owned slaves (like most founding fathers).
Rule #4 "Make the enemy live up to its own book of rules."