U.S. Sen. Marco Rubio, R-Fla., wants answers following reports U.S. Department of Transportation (DOT) Sec. Pete Buttigieg used taxpayer-funded private jets to travel domestically and internationally at least 18 different times since taking office.

Rubio sent a letter to DOT Inspector General Eric Soskin requesting that he conduct a review to determine whether Buttigieg’s travels were in compliance with all applicable regulations, policies, and procedures.

The letter is below.

Dear Inspector General Soskin:

I write to request that you conduct a review of Secretary Pete Buttigieg’s adherence to federal regulations and U.S. Department of Transportation (DOT) policies and procedures for travel. This request follows a troubling report by Fox News that Secretary Buttigieg has used taxpayer-funded private jets to travel across the United States, and internationally, at least 18 different times since taking office. While the total cost remains unknown, the same report notes that, in recent years, the Federal Aviation Administration (FAA) has charged federal agencies approximately $5,000 per hour to use aircraft in its fleet. If these reports are confirmed, it would represent yet another troubling example of this administration’s continued willingness to skirt basic ethics rules.

Pursuant to federal travel regulations, “[b]ecause the taxpayers should pay no more than necessary for your transportation, generally you may…