Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans signal openness to working with Biden Senators offer disaster tax relief bill Trump spikes political football with return of Big Ten season MORE (R-Iowa) took to Twitter Sunday to issue oversight demands to the Trump administration over a deal with Australia to accept some refugees.

The deal, cut during the Obama administration, would require the U.S. to vet as many as 1,250 refugees who attempted to reach Australia but are now held by the country in island detention centers. President Trump has criticized the deal on Twitter and in a phone call with Australia's prime minister, but Grassley's tweet suggests that the Senate Judiciary Committee chairman isn't happy with the administration's handling of the agreement's details.

“Secret agreement between Obama&Australia 4US to take Aussie refugees shld b declassified/If can't be tell me why/WH:ANSWER MY LETTER,” Grassley wrote on Twitter Sunday.

Grassley sent a letter earlier this month to Secretary of State Rex Tillerson asking him to declassify the deal.

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"As I said before, the American people have a right to be fully aware of the actions of their government regarding foreign nationals who may be admitted to the United States," Grassley wrote in the letter.

Grassley is known for the use of his Twitter account, where he has frequently mentioned encounters with deer in Iowa.

“Fred and I hit a deer on hiway 136 south of Dyersville. After I pulled fender rubbing on tire we continued to farm. Assume deer dead,” he wrote in 2012.