From Heather Cox Richardson:

[Director of the United States Office of Management and Budget Russell] Vought, King said, is “one of the ringleaders of the assault on our Constitution. He believes in a presidency of virtually unlimited powers.” He “espouses the discredited and illegal theory that the president has the power to selectively impound funds appropriated by Congress, thereby rendering the famous power of the purse a nullity.” King said he was “really worried about…the structural implications for our freedom and government of what's happening here…. Project 2025 is nothing less than a blueprint for the shredding of the Constitution and the transition of our country to authoritarian rule. He's the last person who should be put in the job at the heart of the operation of our government.”
“[T]his isn't about politics. This isn't about policy. This isn't about Republican versus Democrat. This is about tampering with the structure of our government, which will ultimately undermine its ability to protect the freedom of our citizens. If our defense of the Constitution is gone, there's nothing left to us.”
King asked his Republican colleagues to “say no to the undermining and destruction of our constitutional system.” “[A]re there no red lines?” he asked them. “Are there no limits?”