Is John Deere running a “repair monopoly”? That’s what Minnesota attorney general Keith Ellison alleges in a fresh lawsuit filed against the Illinois-based agricultural equipment maker.

In a lawsuit filed in U.S. District Court for the Northern District of Illinois, Ellison claimed that John Deere has for decades “throttled the ability of farmers and independent repair providers to repair Deere equipment.” The suit said that’s left farmers “wholly reliant” on Deere’s network of authorized dealers for repairs.

The lawsuit names the Federal Trade Commission (FTC) and the states of Illinois and Minnesota as plaintiffs. Ellison and Illinois attorney general Kwame Raoul are representing their respective states in the suit.

Plaintiffs specifically called out John Deere’s use of a repair software tool that’s only available to authorized retailers. Known as “Service ADVISOR,” the software communicates with onboard systems on pieces of farm equipment to make diagnoses and repairs, according to the suit. While the company has another version of the software that’s available to farmers and independent repair shops, the suit said it’s an “inferior” tool that’s not able to make all needed repairs on equipment.

“Deere has monopoly power in the market for fully functional repair tools capable of enabling all repairs on Deere agricultural equipment,” the suit stated.

The New York Times reported Wednesday that FTC members voted in favor of suing Deere along party lines: the three Democratic appointees approved the move, while the two Republican ones voted against it. The newspaper described the suit as “a final push in the Biden administration’s broader efforts to make repairs less costly and time consuming.”

It’s not clear what will become of the case when Donald Trump returns to the White House next week, but the Times quoted a Rutgers professor who said that “right to repair is not a strictly partisan issue.”

Still, in a statement issued Wednesday, John Deere quoted a dissenting FTC member who described the suit as “the result of brazen partisanship.”

“This lawsuit, filed on the eve of a change in [presidential] Administration, ignores the company’s long-standing commitment to customer self-repair and the consistent progress and innovation we have made over time,” John Deere said. “As our equipment has become more technologically advanced, Deere has introduced a number of new innovations, tools, and resources to equip customers and independent repair technicians with the maintenance and repair needs of our equipment.”

John Deere said it plans to “vigorously defend itself against this baseless lawsuit.”

In Minnesota, lawmakers in 2023 passed their own wide-reaching right-to-repair law, following in the footsteps of New York and Colorado.