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“This is not objective testimony at all,” one comment read. “It includes lots of climate alarm propaganda that is not science at all. I am embarrassed to have this go out on behalf of the executive branch of the Federal Government.”

Another comment objects to the phrase “tipping point” to describe when the planet reaches a threshold of irreversible climate change. “‘Tipping points’ is a propaganda slogan for the scientifically illiterate,” the comment reads. “They were a favorite of Al Gore’s science adviser, James Hansen.”

Dr. Schoonover’s testimony noted that his analysis drew from peer-reviewed scientific journals and work produced by top United States government scientists. That, too, came under attack from the National Security Council, which said that “a consensus of peer reviewed literature has nothing to do with the truth.”

But the heaviest proposed edits, and the basis for ultimately blocking the written testimony, came from the White House Office of Legislative Affairs. That office, according to the document, recommended eliminating five pages of science that appeared under the headings “Scientific Baseline” and “Stresses to Human and Societal Systems.”

Those pages laid the scientific foundation for the rest of Dr. Schoonover’s testimony, which described the various national security threats linked to climate change, like instability from water shortages in some parts of the world.

The science portion offered factual assertions like, “The Earth’s climate is unequivocally undergoing a long-term warming trend as established by decades of scientific measurements from multiple, independent lines of evidence.” It also noted that the past five years had been the warmest five on record.

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