Actually Kerry couldn’t set anyone straight on anything. Kerry so habitually lies, he doesn’t even know what is true and what is fake any more.
I was listening to a Boston based talk show at the time (2003-2004), and there were a series of callers. One got three letters from Kerry flip-flopping each time, don’t remember exactly the topic, but probably the WOT or Iraq, another caller said he called Kerry’s office on something, and was told that “Sen. Kerry was voting whatever way Sen. Kennedy was, so call that office...”