Pickwickian is an adjective that means innocent or naive.
In the 19th century Charles Dickens novel, the Pickwick Papers, the character named Samuel Pickwick was noted for having a childlike naivete. In the novel, he gets hoodwinked by conmen and imposters.
Try not be so pickwickian in your dealings with the Senate. If your approach is too innocent, you can wind up getting taken to the cleaners.