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.
You can have a spray, you can have a diffuser, you can have a collar that you can put around them. All of these work very well to help reduce the level of stress and anxiety that your cat may be feeling, which hopefully, once you remove this stimuli, will help to provide a little better litter box for you.