A few years ago one of our TV channels invited several leading politicians to be filmed taking a lie detector test. One guy, the Premier of Queensland at the time, was asked, "Do you intend to keep all your election promises?" He replied that he did and the interviewer said, "That came up as a lie." Abd ge burst out laughing. He knew he was lying, and he knew that few voters would expect an election promise to be anything else.
You're probably right about Hilary. I'm not close enough to judge, but I wouldn't be too quick to give her opponents a clean bill of health, either. She really does seem a poor choice for a presidential candidate.