Some top Republican senators are asking the White House to roll back its plans to withhold funding for the Council of the Inspectors General on Integrity and Efficiency, which oversees watchdogs across executive branch agencies.

Appropriations Chair Susan Collins (R-ME) and Judiciary Chair Chuck Grassley (R-IA) sent a letter Monday to Office of Management and Budget Director Russ Vought that said they were “urgently request[ing] an explanation” of the move, which they warned would “disrupt numerous important oversight functions," but the Trump administration official was unlikely to change course, reported The Washington Post.

“Inspectors general are meant to be impartial watchdogs identifying waste and corruption on behalf of the American people,” said an OMB spokesperson in a statement. “Unfortunately, they have become corrupt, partisan, and in some cases, have lied to the public. The American people will no longer be funding this corruption.”

Collins has for months challenged the administration's clawback of congressionally approved funding. Grassley has long been a champion of federal whistleblower protections, and the duo notified OMB that “effectively defunding” the group was “contrary to congressional intent.”

The CIGIE notified lawmakers over the weekend that OMB intended to withhold funding for the fiscal year that begins Wednesday, which would force the agency to stop its statutorily mandated functions and furlough its employees.

“If unfunded, Oversight.gov and 28 supported OIG websites will be disrupted on October 1,” said the Council’s acting chair, Tammy Hull. “Whistleblowers will likely not be able to file anonymous complaints online with these OIGs. Additionally, individual efforts by each OIG to re-launch their own legally required site will be incredibly inefficient and costly to the government.”

The council was established by Congress in 2008 and spans across the federal government, and its oversight.gov website serves as a clearinghouse for whistleblowers to submit complaints to inspectors general.

OMB's move is part of the Trump administration's broader effort to curtail the power of independent inspectors general after President Donald Trump fired more than a dozen of them in the first week of his second term.