Foreals:
Yeah. He totally just shot the cap & trade legislation. With a gun. Take that you slimy liberals! (...and he's a Democrat)
While the metaphor is a strong one, I think that the imagery is a wee-bit on the cheesy side. It's akin to a politician using the broom and a little person to equate himself as a 'friend to the little man' who will 'sweep out corruption'.
Man, I love O Brother, Where Art Thou?
Head nod: Taegan Goddard