The dead always votes but nothing has ever been done to stop the fraud. Every election is the same yet there is never any serious punishment.
There are constant efforts to stop the fraud. This is done by purging the voter rolls. BUT: almost invariably, Democrats fight tooth and nail against routine maintenance of voter rolls. The dead are just the tip of the iceberg. The much larger problem is people who have moved, or people who may still be consuming oxygen at their listed address but who pay no attention to politics and haven't voted in 20 years. These people should be purged from the rolls. Democrats fight to keep them registered. There is a reason for this.