WASHINGTON — Under fire for a perceived lack of interest in investigating President Donald Trump’s administration, House Oversight Committee Chairman Jason Chaffetz (R-Utah) appears to have sniffed out his next big probe.

But it won’t be into Trump’s financial conflicts of interests, /www.huffingtonpost.com/news/michael-flynn/"}}">Michael Flynn’s contact with the Russian government or the Kremlin’s meddling in the U.S. election. Instead, Chaffetz plans to get to the bottom of a December post to Twitter in which Utah’s Bryce Canyon National Park warmly welcomed Bears Ears National Monument ― and a second monument in Nevada ― to the National Park Service family, as The Salt Lake Tribune reported Tuesday.

Jonathan Ernst / Reuters

The congressman told the publication that he suspects Bryce Canyon officials may have had advanced knowledge of the monument’s designation, which to him suggests the Obama administration misled Utah officials.

“The White House is telling [Utah Gov. Gary Herbert] as well as the congressional offices that no decisions had been made — that it was still an open question — so how is it [Bryce Canyon National Park officials] were already ready to go with that information?” Chaffetz told the Tribune. “The timing is serious.”

The tweet Chaffetz finds so suspicious was posted by Bryce Canyon on Dec. 29, the day after the White House designated the more than 1.35-million-acre Bears Ears National Monument in southern Utah. It’s not the actual timing of the tweet that raised red flags for Chaffetz but what he suspects was known before the tweet. Along with a photo showing a new compartment for Bears Ears maps, the park wrote that it had been holding a “hopeful slot” for the monument for some time.

Welcome to the family Bears Ears (& Gold Butte) NM! A hopeful slot in our front desk maps has long been held for you pic.twitter.com/r1vCLO7Uts — Bryce Canyon NP (@BryceCanyonNPS) December 29, 2016

“Maybe they were just hopeful, but they regularly complain about lack of resources and more money for maintenance budgets and this is a small item but I want to know if there was communication and were they being truthful with the governor and the delegation,” Chaffetz told the Tribune.

Apparently, an explanation provided earlier this month by Bryce Canyon’s interim superintendent, Sue Fritzke, was not enough to allay Chaffetz’s fears.

On Feb. 2, Fritzke responded in writing to the congressman’s initial inquiry that the Twitter post was innocent and that she first learned of the designation on Dec. 28, the Tribune reported. The new map slot, she said, was added over the summer by a park volunteer who “saw a news report regarding the potential for a Bears Ears National Monument.”

“He approached his supervisor, Supervisory Park Ranger (Interpretation) Cindy Donaldson about holding a brochure slot, and she approved it knowing that if the Bears Ears National Monument was not created the slot could be used by another regional recreation area,” Fritzke wrote to Chaffetz, according to the Tribune.

Much like the rest of Utah’s congressional delegation, Chaffetz has been a vocal critic of the Obama administration’s designation of Bears Ears. He called it “a slap in the face to the people of Utah” and has urged Trump to rescind the designation. On Tuesday, Chaffetz told The Deseret News that the president “absolutely” wants to take action.

In recent weeks, Chaffetz has faced a barrage of criticism. Along with accusations that he’s going soft on Trump, he was bombarded with angry phone calls over a bill he introduced aimed at selling off 3.3 million acres of national public land in 10 states ― an area nearly the size of Connecticut. Chaffetz later withdrew the measure in response to the backlash.

During an appearance earlier this month at a town hall event in Cottonwood, Utah, angry constituents booed and scolded the chairman of the House Oversight Committee, chanting, “Do your job!” In the wake of the fiasco, Chaffetz chose a response favored by Trump, claiming that the furious town hall crowd was infiltrated by paid out-of-state protesters.

And in a searing editorial last week, the Tribune urged Chaffetz to “investigate, not emulate” the president.