New Mexico’s voter rolls are changing fast after primary overhaul

New voter registration data suggest New Mexico’s political landscape may be shifting in ways that could reshape future primaries, with both major parties losing registrants while “declined to state” voters surge following Democrats’ overhaul of the state’s primary election system.

According to the latest 2026 voter registration update compiled by Decision Desk HQ, New Mexico now has 1,422,544 total registered voters, with Democrats maintaining a registration advantage of 130,077 voters over Republicans. But beneath the surface, the latest numbers show notable movement away from both major parties and toward independent registration.

Democrats currently hold 573,297 registered voters, Republicans have 443,220, and voters registered as “other” or declined to state (DTS) now total 406,027.

Compared to April, Democrat registration dropped by 257 voters, while Republican registration fell by 378. Meanwhile, DTS/other registration surged by 6,731 voters in just one month.

The spike comes less than a year after Democrats and a handful of Republicans in the New Mexico Legislature passed legislation opening partisan primary elections to independent and DTS voters for the first time in state history.

Under the new law, voters registered as DTS can now choose either a Republican or Democrat ballot in the primary without permanently changing their registration, a major departure from New Mexico’s longtime closed-primary system.

Critics warned at the time that the change would incentivize voters to abandon party registration altogether while still participating in partisan nomination contests, potentially diluting party identity and encouraging crossover voting.

The newest numbers may be showing exactly that.

Since November 2024, Democrat registration has fallen from 590,301 to 573,297, a drop of 17,004 voters. Republicans have grown modestly from 435,362 to 443,220, a gain of 7,858, but that increase is dwarfed by the growth in DTS/other registration, which exploded from 351,422 to 406,027, an increase of 54,605 voters.

That means unaffiliated and third-party registration has grown nearly seven times faster than Republican registration since the last presidential election.

The trend raises significant questions about how the new semi-open primary system may affect both parties, particularly in competitive primaries where independent voters could now help determine nominees.

Some political observers speculate that left-leaning voters may be strategically registering DTS to preserve the ability to participate in either party’s primary depending on where they believe they can have the most influence. Others argue many voters simply prefer no formal party affiliation now that they can still cast a primary ballot.

Regardless of motive, the numbers suggest New Mexico’s electorate is becoming less tied to party labels even as Democrats continue to hold a substantial registration edge.

Still, that Democrat advantage has been shrinking over time.

In November 2016, Democrats led Republicans in registration by 199,883 voters.
By November 2020, that lead had fallen to 185,848.
By November 2022, it was 177,966.
By November 2024, it had narrowed further to 154,939.
Now, as of May 2026, the Democrat advantage stands at 130,077.

That represents a total Democrat registration advantage decline of nearly 70,000 voters over the past decade.

Yet despite the narrowing registration gap, Democrats still won New Mexico in the 2024 presidential election by just 6 points, according to the graphic.

Whether the continued rise of DTS voters ultimately benefits Republicans, Democrats, or neither remains to be seen.