Another week, another high-profile exit from the Trump administration. Mere hours after Donald Trump put an end to his desperate chief of staff search by appointing Mick Mulvaney, the president announced Interior Secretary Ryan Zinke as next to go. “Secretary of the Interior @RyanZinke will be leaving the Administration at the end of the year after having served for a period of almost two years. Ryan has accomplished much during his tenure and I want to thank him for his service to our Nation,” Trump tweeted early Saturday morning. A replacement, he added, would be announced “next week.”

Zinke’s exit is not surprising: the former congressman was already under investigation by the Justice Department, and likely to face additional scrutiny and probes as Democrats take over the House of Representatives in January. As CNN previously reported, the Interior inspector general had opened multiple inquiries into allegations that Zinke used his office for personal gain, including using tax-payer money to fund his family’s travel expenses and Zinke’s personal dealings with Halliburton Chairman David Lesar regarding a land development deal in Zinke’s hometown of Whitefish, Montana. (Zinke has denied any wrongdoing.) Some reports have suggested Zinke’s next career move could be with Fox News, or perhaps a run for Montana governor. (No one at Fox News, according to a spokesperson, has spoken to Zinke about a contributor role.)

Zinke, after all, remains a popular figure with Republicans, ethics scandals be damned. During his tenure, Zinke focused on shrinking land tracts designated as national monuments by the Obama administration, reassessing the nation’s offshore energy potential, and deploying department resources to federal lands on the U.S.-Mexico border—allegedly resulting in a “4000 percent increase in arrests of illegal aliens.”

Bloomberg reports that the Interior Department’s second highest-ranking official, David Bernhardt, will assume the role of acting secretary. Candidates in consideration to replace Zinke are said to include former Wyoming congresswoman Cynthia Lummis, Utah Attorney General Sean Reyes, Idaho Governor C.L. “Butch” Otter, former Nevada Senator Dean Heller, and outgoing Wisconsin Governor Scott Walker, among others.