Maybe his phony liberal politics and Kennedy legacy were the source of his self loathing that made him need to self medicate. Maybe with his father gone he can live a principled honest life and finally find contentment.
Or maybe he just wants to get drunk and drugged up all the time and his Congressional responsibilities were getting in the way.
Finally, What Sarah wants to do - short video part of "Part-3" below
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Other videos: This is the 30 minute interview with Chris Wallace from Fox (2-7-10), in 3 parts: