See? The government (Congress + the POTUS) are part of the problem, and unfortunately also control many of the means to a solution. Ask the average American how good a job Congress is doing with the economy and you'll likely get a negative response.
THAT leads to less confidence in their ability to fix the economy. THAT leads to more uncertainty for consumers. THAT leads to less big ticket spending. THAT leads to a slower economy and fewer jobs. And with the slower economy and fewer jobs, THAT leads to even less confidence in Congress/POTUS. And so on and so on.
Until they show economic leadership and a cohesive, intelligent, feasible plan, nobody will believe it can get done. It doesn't even have to work. If people believe it will work, they will change their spending habits. People don't buy based on Keynesian analysis, they buy based on emotion. Right now, the prevailing emotion towards the economy is negative because our government has PROVEN THEY HAVE NFI WHAT THEY'RE DOING.