It was bound to happen sooner or later, though Democrats very much hoped that it would be later. Public opinion is shifting -- sharply -- and Americans are beginning to blame the Democrats for the state of the economy.  According to CNN, 38 percent of Americans blame the GOP for the state of the economy, down 15 percent from May, while 27 percent of Americans blame the Democrats, up six percent.  27 percent blame both parties.  Perhaps even more troubling, 28 percent of Americans believe that Obama's policies have harmed the economy, while 35 percent think they've made no difference.