this is perhaps the most anticipated debate of the election season. it s also the only chance for pennsylvanians to see the candidates side by side. they re debating just this one time. the senate is 50-50 and pennsylvania is crucial in the fight to either keep or gain control. cnn s jeff zeleny is in harrisburg where the debate is happening. jeff, what should people expect to see tonight? reporter: well, victor, i think people can expect to see fireworks as we ve seen in debates across the country. more interestingly this has a unique element to it and that is because of john fetterman. of course he s the lieutenant governor of pennsylvania but he s been recovering from a stroke for the last several months. so this debate tonight is going to be slightly different. it s going to have a closed captioning system. john fetterman is still having auditor processing issues. he can t always hear and see things in realtime so he ll be using closed captions as many americans do when