Wrong branch of government, wrong party.
The Treasury is responsible for paying bills, and it's part of the executive branch, under the control of the president.
Biden is threatening to tell the Treasury to default unless he's given more power to borrow. His finger is on the button.
He doesn't want to go to the table to discuss that expansion of power because he believes the public doesn't realize how their government is organized, and so is buying his spin.
He's probably right, though.