As I understand it (and don’t take my word for this), prosecuting a charge of contempt of Congress requires Congress to go through a US attorney, which is obviously not something Congress can rely on in this case. However, I believe there is something known as ‘inherent contempt’, which involves the sergeant-at-arms and other such officers of the Congressional retinue/whatever personally taking physical charge of the target and placing that person in one of the cells in the Capitol jail.
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