The Hallelujah song was in the last episode of Season 3 of the Tv Show West Wing. The Episode was Titled "Posse Comitatus"
https://www.youtube.com/watch?v=cxX-woxYZ84
President Bartlet makes a life-or-death decision regarding the defense minister of Qumar who is a known terrorist. The flirtation between C.J. and her Secret Service bodyguard, Simon Donovan, is limited by their professional relationship and then cut short by tragedy. Josh defeats Amy in the welfare bill battle and their relationship is left with an uncertain future. President Bartlet encounters his opponent, Governor Ritchie, at a performance of The Wars of the Roses.
Note: The episode title refers to the Posse Comitatus Act, which limits the power of the US government to use the military to enforce laws within the United States.