Is there anything similar to your story that's already been made, that you could study and analyze? For example would watching a couple of seasons of The West Wing get you anything? Ditto Washington: Behind Closed Doors, if you can find it, based on John Ehrlichman's book, The Company. I don't know where your story takes place so I'm guessing wildly. But series like these are full of smart dialogue and characters wrapped up in political conflict and personal drama.