Who to Contact
Contact your local congressman and tell them to tell the FCC to stop Mud Duck Radio!
A list of congressmen and phone numbers can be found here.
https://www.congress.gov/members?q=%7B%22congress%22%3A117%7D
Also if you’d prefer to go straight to the top, you can contact FCC chairman Brendan Carr with his publicly available email address found at https://www.fcc.gov/about/leadership
Again, this is a PUBLICLY available email address that HE CHOSE to make public.