While Congress retains its inherent contempt authority and may exercise it at any time, this inherent contempt process was last used by the Senate in 1934, in a Senate investigation of airlines and the U.S. Postmaster.
To make a scared cat feel more comfortable, set up a covered cave for them to retreat to. Line it with soft bedding and partially cover the entrance so that the cat will feel safely obscured inside. In the same vein of thought, you can purchase a cat tower for the cat to lie on top of.
Position your cat. Keeping your cat comfortable will help you give it subcutaneous fluids more easily. Position your cat in your lap or on a smooth, flat surface (table, top of washer or dryer). If your cat gets squirmy, considering asking someone else to gently position and hold your cat.