Tracking Trump's visits to his properties and other conflicts of interest

The requested records would shed light on whether Secretary Zinke, like other cabinet heads, has traveled on non-commercial flights for official business.

Secretary Carson has a very visible role in introducing President Trump at a campaign rally in Phoenix, Arizona, raising questions about whether his trip was government-funded.

Reportedly in a one-week period alone, Secretary Price traveled by private jet for official business.

Washington, D.C. "has become a symbol of the tangled ethical questions posed by Trump's presidency."

The requested records would shed light on whether Secretary Zinke again improperly used government funds to travel to his home state for personal reasons.