EPA administrator Scott Pruitt enlisted a top aide to help his wife find a job a year ago, the Washington Post reports, a potential violation of federal ethics rules that prohibit public officials from using their office for private gain.
Pruitt, Inhofe told the Post, would be "in a very awkward position not to answer to me, and to answer me truthfully".
Inhofe's comments are among signs that some conservatives may be losing confidence in Pruitt, Oklahoma's former attorney general.
Ingraham linked to a new report detailing how Pruitt used a top aide and GOP donors to help his wife, Marlyn Pruitt, find a job.
Other recently disclosed examples of Pruitt seeking special treatment include his repeated use of first-class air travel, luxury hotel suits and directing his security staff to use lights and sirens to speed through Washington traffic to dinner reservations. But the president also said Pruitt isn't "blameless" for his many ethics controversies.
Inhofe said he planned on asking Pruitt about his "spending and management decisions", in the paper's words. "I am sending over a communication [Wednesday] that says we have had enough of these things". After Wednesday's story, Fox News host Laura Ingraham tweeted that Pruitt's "gotta go".
If Pruitt left, his immediate replacement could be Andrew Wheeler, now serving in the No. 2 spot at the EPA after years of lobbying on behalf of coal producer Murray Energy Corp. and other energy companies. "I would say this, that there's a guy behind him in (EPA Deputy Administrator) Andrew Wheeler who is really qualified too, so that might be a good swap".
EPA Administrator Scott Pruitt testifies before a Senate Appropriations Interior, Environment, and Related Agencies Subcommittee hearing on the proposed budget estimates and justification for FY2019 for the Environmental Protection Agency on Capitol Hill in Washington, U.S., May 16, 2018. The Iowa-based American Future Fund has produced an ad calling Pruitt a "swamp monster" and calling for his ouster "for the good of the country".