Rep. Alexandria Ocasio-Cortez (D-NY) has replaced her longtime digital fundraising firm as she continues making changes to her political operation ahead of a potential 2028 presidential campaign or a challenge to Senate Minority Leader Chuck Schumer.

Ocasio-Cortez, who won reelection to her House seat earlier this month, parted ways with Middle Seat and hired Aisle 518 Strategies, a firm led by Democratic strategist Tim Tagaris, according to Axios. The outlet reported Thursday that the decision was confirmed by people familiar with the changes.

Tagaris previously oversaw the online fundraising operation for Sen. Bernie Sanders (I-VT) during his two presidential campaigns, helping build a small-dollar donor network that became a major part of Sanders' political organization. His firm has also worked with several prominent Democrats who could emerge as contenders in the 2028 presidential race.

Aisle 518 Strategies has helped manage the small-dollar fundraising operation for California Gov. Gavin Newsom, who is widely expected to seek the Democratic presidential nomination. The firm's website also lists work for Sen. Mark Kelly (D-AZ), Sen. Jon Ossoff (D-GA) and former Vice President Kamala Harris.

Middle Seat had been a major part of Ocasio-Cortez's political operation for years. The New York Democrat paid the firm more than $6 million over the past two years, accounting for approximately one-quarter of her campaign and political operation's disbursements during that period, according to Axios.

Both firms have connections to Sanders' political network. Middle Seat was founded by veterans of Sanders' 2016 presidential campaign, while Tagaris helped lead his online fundraising efforts. Ocasio-Cortez has maintained a close political relationship with Sanders, making the staffing decision notable as speculation grows about her next political move.

The fundraising change is part of a broader restructuring of Ocasio-Cortez's political team. Earlier this year, her longtime campaign manager and creative director departed, while several former aides returned to her operation. She also brought on Freeland Ellis, a former Sanders aide, to oversee communications.

Ocasio-Cortez has not announced whether she intends to pursue a presidential campaign or challenge Schumer for his Senate seat. Schumer's seat will be up for election in 2028, the same year Democrats will choose their nominee to face the Republican presidential candidate. Her latest personnel changes, however, place her political operation in a position to prepare for a larger campaign beyond her current House district.