My favorite so far was Marco Rubio quoting a line in the godfather:
"... 'A lawyer with his briefcase can steal more than a hundred men with guns.' Now, I don't know how the hell that relates to this argument, but I thought it was a good quote."
Based on Sen. Al D'Amato's 1986 23.5 hour filibuster of a military bill. Another of his filibusters in 1992 involved him singing 'South of the Border.' EDIT: typos.