Why did nearly 500,000 Colorado voter records change after elections were certified?

By Heidi Ganahl | Commentary, Rocky Mountain Voice

Colorado voters are constantly told to trust the system.

Trust the process. Trust the machines. Trust the results.

That’s where a new complaint under the federal Help America Vote Act enters the picture.

Colorado changed 487,887 voter records AFTER elections were certified.

• 328,895 changes tied to 2020
• 155,576 tied to 2022
• 3,416 tied to 2024

That’s not “routine maintenance.”
That’s altering federal election records years later.

A formal HAVA complaint has been filed… pic.twitter.com/AJdofqL3Ih

— Unite4Freedom (@Unite4Freedom) March 5, 2026

It names Colorado Secretary of State Jena Griswold and focuses on something most voters probably never think about—what happens to election records after certification.

The complaint says voter participation records were modified nearly half a million times across those three election cycles.

There’s one number in the complaint that’s hard to miss—487,887.

Michael Cahoon filed the complaint. It’s now being circulated by election watchdog groups including Unite4Freedom and election integrity advocate Peter Bernegger.

💥 EXPLOSIVE DATA FROM COLORADO – HAVA complaint filed against Jena Griswold!!

Official election records show post-certification ballot changes:

• 2020 election: 328,895 changes
• 2022 election: 155,576 changes
• 2024 election: 3,416 changes

TOTAL: 487,887 voter history… pic.twitter.com/bxhvWTuuzh

— Peter Bernegger (@PeterBernegger) March 5, 2026

Using Colorado’s own publicly available voter data files, the complaint compares voter participation records from different points in time after elections had already been finalized.

The complaint points to three election cycles. The complaint points to earlier elections for most of the changes—more than 328,000 tied to 2020 and roughly 155,000 connected to the 2022 cycle. The 2024 election shows far fewer—about 3,400 changes.

The complaint categorizes those changes as voter participation records shifting between “vote” and “no vote,” along with entries reflecting ballots added or removed in the voter history database after elections were certified.

Supporters of the complaint argue that once an election is finalized, those underlying participation records should not continue changing months or years later.

If they do, voters deserve to understand why.

The filing lays out seven alleged violations of federal election law under Title III of the Help America Vote Act. Among them are claims that Colorado failed to maintain accurate voter registration records, allowed improper removals from the statewide list and lacked sufficient safeguards protecting the computerized voter database.

It also raises questions about whether Colorado’s federally required HAVA State Plan has been properly updated as the state expanded mail-in voting and automatic voter registration.

The complaint requests a formal hearing, preservation of relevant records and production of documents explaining how these post-certification changes occurred.

Importantly, the filing does not claim election fraud. Instead, it argues that Colorado’s voter database practices may conflict with federal election administration requirements.

Still, the scale of the numbers raises an obvious question.

How does nearly half a million voter participation records change after elections are already certified?

Maybe there are routine explanations. Election databases are complex systems. Clerical corrections happen. Data reconciliation happens.

But if hundreds of thousands of official records change after certification, voters deserve a clear explanation—not eye rolls for asking the question.

Colorado isn’t the only state where this issue is coming up. Similar complaints using the same type of voter file analysis have surfaced in states like Georgia, Michigan, Pennsylvania and Texas. The groups behind them say they’re simply comparing publicly available voter data from different points in time. Whether those arguments succeed in court is still an open question, but the effort shows a broader push to examine how election data changes after certification.

Colorado has long marketed itself as the gold standard for election administration. Mail ballots, drop boxes and same-day registration are central to that system. Supporters say it works well.

But anyone who has taken a closer look at the system—including the Douglas County audit—knows there are still serious questions.

But transparency is part of trust. And when large numbers of election records change after the fact, asking questions isn’t conspiracy—it’s accountability.

The issue also lands in the middle of one of Colorado’s most controversial election cases.

Former Mesa County Clerk Tina Peters is currently serving a prison sentence tied to actions she took while attempting to preserve election system data after the 2020 election.

At the time, Secretary Griswold and other officials argued Peters’ actions threatened the security and integrity of Colorado’s election systems.

Now critics are pointing to the newly filed complaint and asking a different question: if election participation records can be altered after certification, what exactly counts as protecting election data?

For many Coloradans, that contrast is hard to ignore.

Colorado Republicans and election integrity advocates have raised concerns for years about the state’s all-mail voting system, the verification process for ballots and the transparency of the statewide voter database.

This complaint adds another layer to that debate.

The 2024 figure also stands out. It’s much smaller—about 3,400 changes. That could suggest better oversight, or it might just come down to how the numbers were recorded.

But the cumulative number since 2020 still approaches half a million voter record changes.

That’s a number voters deserve to understand.

Under HAVA procedures, the Secretary of State’s office must now review the complaint and issue a determination. Because the complaint names Griswold as the respondent, some observers have already raised concerns about whether the process will be viewed as impartial without outside oversight.

Regardless of where the investigation leads, the principle is simple.

Election systems work best when voters believe the records are stable, accurate and transparent.

If election records change after certification, voters deserve a straightforward explanation.

Colorado officials frequently describe the state’s system as the most trusted in the nation.

Maybe this complaint leads nowhere. Maybe it leads to hearings or audits.

Either way, the questions are now out there.

And Coloradans deserve answers.

Heidi Ganahl is a conservative policy advocate and grassroots leader in Colorado. She serves on the board of the American Conservation Coalition, where she backs local, free-market ideas for protecting the environment. Ganahl is also the founder and president of Rocky Mountain Voice, a center-right media platform, and previously launched Camp Bow Wow—now North America’s leading pet-care franchise. A University of Colorado Regent from 2017 to 2023 and the 2022 Republican nominee for governor, she also founded SheFactor and the Fight Back Foundation, and hosts the Unleashed with Heidi podcast, where she promotes liberty, accountability and grassroots leadership.

Editor’s note: Opinions expressed in commentary pieces are those of the author and do not necessarily reflect the opinions of the management of the Rocky Mountain Voice, but even so we support the constitutional right of the author to express those opinions.