A Michigan watchdog group filed a complaint with the Internal Revenue Service on Wednesday, alleging that a nonprofit organization’s funding of Democratic Gov. Gretchen Whitmer’s private trip to Florida violated federal tax law.

Whitmer’s March trip was “not within the exempt purpose of Michigan Transition 2019,” the organization that paid for the governor’s chartered plane, and the payment was a “private benefit” to Whitmer, said Michigan Rising Action in its complaint.