Especially when it's about Bill Clinton. This time it's Rush Limbaugh claiming that Clinton's approval ratings were "down in the 20s" at one point and that he had "parallel poll results" to Bush in his second term.
The reality? Clinton's low was 36%, and was above 58% the entire year of 1998, which corresponds to this year in Bush's Presidency
Why do they lie? Might as well ask why a fish swims, or a frog hops. They just do, even when there's no reason to. And when they do have a reason to, like this, they get some real whoppers in.
Hat tip to MediaMatters, always a worthwhile read.