National Public Radio has hired the lobbying firm Navigators Global, according to disclosure forms filed Thursday.

NPR has come under fire from some Republican lawmakers who want to cut off all federal funding to the nonprofit media organization.

Dana Rehm, an NPR spokeswoman, explained that in addition to being a national radio service, NPR is also a trade organization representing its local member stations. She noted that no federal funds are being used to pay for the lobbying firm.