What does the expression Hell Bent for Election mean?

The phrase "hell bent for" is an exclamation used to mean "extremely." It refers to the idea that the person will go to hell in order to achieve their goals. "Hell bent for election" means that they are willing to do anything to get elected. There is another common phrase, "hell bent for leather," which means that they are in such a hurry that they will do whatever it takes to reach their destination.