Amazon chief executive Jeffrey P. Bezos, seen in 2014. (Ted S. Warren/AP)

Amazon.com and Sen. Bernie Sanders (I-Vt.) are sparring over working conditions at Amazon warehouses, after the senator called for legislation that would require large employers to reimburse the government for food stamps, Medicaid and other federal assistance received by their employees.

Amazon on Wednesday published a rare blog post rebutting the senator’s claims that thousands of Amazon employees rely on federal benefits to make ends meet. Those figures are “inaccurate and misleading,” the company said, because they include temporary workers as well as those who choose to work part time.

The Seattle-based tech giant has typically stayed above the political fray, most notably by refraining from responding to President Trump’s repeated Twitter attacks on the online retailer and its founder, Jeffrey P. Bezos. (Bezos owns The Washington Post.)

While Senator Sanders plays politics and makes misleading accusations, we are expending real money and effort upskilling people,” the company said. “We have been in regular contact with his office and have offered several opportunities for Senator Sanders and his team to tour one of our fulfillment centers (FCs). To date he has still not seen an FC for himself.”

A few hours later, Sanders responded with a press release of his own.

The senator said he had requested to visit an Amazon warehouse in Wisconsin in July, but “unfortunately, Amazon could not accommodate me then.” Sanders added that he is planning to visit a facility in Chester, Va., next month.

“Bottom line: the taxpayers of this country should not have to subsidize employees at a company owned by Mr. Bezos who is worth $155 billion,” he wrote. “That is absurd.”

Sanders also called on Amazon to publicly announce the number of people it hires through temporary staffing agencies, as well as the hourly rates and benefits given to those workers. Amazon, for its part, says it created 130,000 new jobs last year, though it did not specify how many were full-time positions.

The Seattle Times last week reported that Amazon had enlisted a group of warehouse workers to write positive tweets about their experiences. The employees, identified on Twitter as “Amazon FC Ambassadors,” had all recently created Twitter accounts devoted to defending the company against claims of harsh working conditions and unfair pay.

Read more:

Thousands of Amazon workers receive food stamps. Now Bernie Sanders wants the company to pay up.

Retailers are marketing directly to kids shopping on their smartphones

Amazon Prime Day: Worker strikes and a site crash dent the online shopping bonanza