the oval office. but history may not be our best guy. i d here of course, the politics now are far more vitriolic and rough and tumble, but president biden has been practicing at camp david, the presidential retreat outside washington engine for this very reason, there s no american politician alive who is debated as often he knows well that first term presidential curse. that s why even tonight, he s still practicing with his aides jeff zeleny. thanks. the news continues right here on cnn and outfront next to a special edition lie from cnn s debate headquarters in atlanta, breaking news tonight on biden strategy, a technique that insider for say a said biden s favorability, quote, off the charts. this as questions swirl over whether trump will announce his bp as early as tomorrow. has a real-time demonstrate patient of what will happen when one candidate tries to interrupt the other. the question everyone has that and everything else you need to know about the debate rules