I loved "A Mighty Wind", too. I can imagine all of the characters as Democrats, still trying to take themselves as seriously as they did in the 60's. Very funny film.
Actually, it was "Spinal Tap" I enjoyed so much. I found "A Mighty Wind" worth a chuckle or two, but nowhere near as good as ST.
The entire Christopher Guest/Harry Shearer oeuvre falls into the "either you think it's hilarious or stupid" category. I go for "hilarious." "Best in Show" is probably the best of them. I think cause it gave them a chance to satirize a bunch of different characters, instead of just taking on one stereotype (small town, folk singers).
SD