New York Mayor Zohran Mamdani has laid the groundwork for a 2029 reelection campaign, launching an early fundraising drive while warning supporters that political opponents are organizing years ahead of the next mayoral race.

In a text message sent to supporters Thursday, Mamdani urged recipients to contribute to his reelection effort, arguing that opponents of his administration are working year-round to build political and financial influence.

"Their fundraising is constant and prolific," Mamdani wrote in the message obtained by Politico. "In closed-door meetings, wealthy donors and insider operatives consider how to influence our politics year-round.

"That's how our opponents secured the resources to spend $83 million against our movement last year. ... That's why we're making investments in our movement starting right now."

Mamdani did not identify the individuals or organizations referenced in the message.

The fundraising appeal comes less than six months into Mamdani's term and underscores the political pressure surrounding one of the nation's highest-profile progressive elected officials.

The mayor faces growing opposition from a newly formed organization known as NYC Common Sense, which says it intends to challenge his agenda through advertising campaigns, policy proposals and litigation.

The group is led by former mayoral candidate Jim Walden and political consultant Phil Singer and has raised roughly $1 million from undisclosed donors.

While no major challenger has entered the 2029 Democratic mayoral primary, the emergence of organized opposition has fueled speculation that a moderate Democrat could eventually seek to unseat Mamdani, a democratic socialist.

Trip Yang, a longtime Democratic strategist, said the mayor's decision to begin raising money years before the next election could discourage potential rivals from entering the race.

"A strong early fundraising number is important to show the reelection is well-positioned," Yang said. "Zohran walks on water with many Democratic primary voters, but he has his skeptics and some Democrats are jealous of his success. An impressive start can head off the more serious potential challengers."

Mamdani, a former New York state assemblyman from Queens, was elected mayor last November after winning a closely watched race that drew national attention. He became New York City's first Muslim mayor when he took office Jan. 1.

His rise was fueled by an affordability-focused campaign centered on housing costs, transit, childcare, and economic inequality. Supporters praised his grassroots organizing network and small-dollar fundraising operation, which helped propel him to victory over well-funded opposition.

Since taking office, Mamdani has pursued a progressive agenda that includes expanding social services and advancing housing initiatives.

His administration has also drawn criticism from some business leaders and political opponents who argue that his policies could raise costs for employers and investors.

Recent polling shows that Mamdani remains relatively popular among New York voters, though opposition to his agenda has become increasingly organized as his administration advances its legislative priorities.

By beginning reelection fundraising more than three years before the next mayoral contest, Mamdani is signaling that he expects those political battles to continue well before voters return to the polls in 2029.