#Growing signs that mass mail-in voting is going to be a disaster

Most of the media keep waving off any suggestion that mass-scale mail-in balloting could prove a disaster this November. But what if the bungling already seen here in deep-blue New York also happens in Florida, Pennsylvania or some other swing state?

Remember: It was Democratic officials who produced the infamous “butterfly ballot” in Florida in 2000 — turning normal, in-person voting into a confusing mess.

The snafu’d New York ballots that went out marked as “military absentee” rather than “military/absentee” are confusing many citizens — who may fail to vote as a result. And sending incorrectly addressed return envelopes may yet mess with the count, even if Board of Election officials get the right ones off.

Blaming vendors is all well and good — but these are huge red flags of serious quality-control issues. As Jiong Wang of Brooklyn Heights told The Post, “This is not stoking confidence in the election system.”

Like many other Brooklynites, Wang got a return envelope for his ballot with the name and address of a different Brooklyn voter filled in; his wife got his return envelope.

The Post has already tracked down a lot of those misaddressed-envelope mistakes — each of which could still wind up invalidating that vote. This is a rolling disaster.

And what of the errors that don’t get caught before people have already voted?

These glitches, ironically, come from bungled efforts to make vote-by-mail easier. Does anyone have much confidence that New York — or any other state run by Democrats who support universal absentee voting — is taking enough precautions against illegal “ballot harvesting”? That’s where third-parties intercept the ballots for naive voters and fill them in for their candidates.

And it’s not just President Trump and his allies questioning the process.

City Councilman Jimmy Van Bramer, a progressive Democrat, told The Post, “People were already not trusting this process, and they were already not trusting the Board of Elections to count the ballot right.”

Meanwhile, Democrats in Congress continue to hold up the next pandemic-relief bill, which includes funds for states to beef up election security, because they insist it include bailouts for near-bankrupt blue states like New York and Illinois.

New York City’s Board of Elections has screwed up time and again — sometimes with “help” from politicians who demand big changes without offering the funds to make things work well. But this is far from the only state where elections are overseen by bottom-rung political hacks who’ve been handed a patronage job.

If Congress — and state officials — doesn’t set realistic national standards soon, the nation’s at serious risk of uncertain results in multiple states.