Four days before a potentially game-changing election, voters have been inundated with TV commercials that simplify, and often distort, some painful realities. The economy is barely creeping along, there's a sense that President Obama's agenda has failed, and Democrats are not defending it in their campaigns. Republicans are long on attacks but short on persuasive alternatives, so both parties are courting the Independents who will decide next week's elections. With the nation facing challenges of mind-boggling complexity, TV commercials simplify more than ever and their rates of accuracy are falling fast. With another rally ready to form up on the Washington Mall, we get several assessments of this year's campaigns.