I've discussed this in my reports. They have never used the TGA for anything other than cash management. It has never been used to manipulate markets. It has never been used for political purposes.
Even Trump hasn't played games with it. The TGA is Kryptonite. It's there for a specific purpose. Over the past dozen years, it has been built as a "rainy day fund," but in use, to fund the government when the debt hits the legal limit. When the limit is hit, that's when they use it. The debt limit is raised when the TGA approaches zero. Every time.
They've gotten away with borrowing to fund the war for a couple months. But the fuse is lit, the time bomb is activated.