"When does Rush talk to Kerry that he could ask him these questions?"
Since when does Rush have to talk to Kerry?
Did Michael Moore ever speak to President Bush?
Your incessant whining that Rush won't "ask him to sign a form 180" carries with it the requirement that he actually speaks with him. He could make a demand on his show, but why would Kerry listen when he was already directly ASKED by Tim Russert, and did nothing?
Face it, Rush making a demand that Kerry sign a form 180 might make you feel better (although I highly doubt it), but it won't serve any other purpose.