The GOP has a stranglehold in state and local politics, and thus on the U.S. Congress, that most Americans don't even grasp. If you're up to reading a book, I recommend Ratf**ked, by David Daley. Here's a link to a Fresh Air interview of the author, for a synopsis:
(If you click on the title of the piece, in the blue box, it will take you to a transcript of the interview, if you prefer to read rather than to listen.)
(If you click on the title of the piece, in the blue box, it will take you to a transcript of the interview, if you prefer to read rather than to listen.)