Do you catch what he says :
https://youtu.be/Dlb8Cg8IMas?t=270
"(...)let gas" ?

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I think what you are referring to is the part where he said "gaslit." It's the past tense of "gaslight." This means to psychologically manipulate someone into questioning their own perceptions, memory, and sanity even and perhaps especially when they are correct.

The complete sentence was "the attorney general gaslit the country."