[MtnClimber]

As long as leftists don't use this to cause chaos in elections.

Rules that undermine the “integrity of the electoral process” also undermine the winner’s political legitimacy. ... The counting of unlawful votes—or discarding of lawful ones—erodes public confidence that the election results reflect the people’s will. - John Roberts

[Freedom4US]

Before the election: - they mail out fraudulent ballots to fraudulent people. “The election hasn’t happened yet. You don’t have standing”. Never mind the candidate, what about the people?

After election day: “It’s too late now to do anything about it”. You don’t have standing there either. Weird, huh?

[Phlyer]

As long as leftists don't use this to cause chaos in elections.

Too late. It's already been done. It's been done in every election since Al Gore's "hanging chad" election. It's very clear that they 'cause chaos' until they have manufactured enough votes to "win". Then they declare the election to be over. Unless the courts step in to stop the chaos (see, "Al Gore").