True, if you tell some people that the computer printout says pigs can fly -- they'll believe it. The important thing is the conscious choice to seek truth. Do we seek economic data to learn about the economy or are we grabbing numbers to win a political argument?
Well, I think it's even more difficult a problem than that - most of the voters lived through and personally experienced both the Clinton years and the last four years. They have their own perceptions about these things.