The graph
@taiyuu_otoko provided is interesting. It is known that economic policy decisions take time (years) to fully come to fruition. If you take a look at that graph it will tell you some interesting things.
The steepest upswing in the graph occurs in the Reagan years. This is Reganomics in action. The prosperity that resulted from Reagan's economic and foreign policies were maintained through the George Bush 41 years, and through the Clinton years (thank you Newt Gingrich as well as the "Welfare to Work" program).
In 2000 you begin to see the graph slip again. Clinton's policies were coming into full effect despite the 1996 Congress and Welfare to Work and an actual balancing of the Federal Budget during his administration. Bush 43, who was Republican but who was NOT fiscally conservative, paused the slide until late into his tenure, but the slide that started coming out of the Clinton years was continuing. Once Obama got elected notice how the graph plummets. Bush policies, which began running deficits again after Gringrich and the Clinton Admin had balanced the budget, started the slide but the Obama years have accelerated it immensely.
People who get handouts vote to keep getting handouts. People who depend on voters who get handouts to get elected care more about keeping power vis a vis keeping the voters voting for them, welfare of the country be dammed (pun intended).
This is the key difference between Hillary and Trump.
Hillary wants the majority to be people who get handouts and people who feel sorry for the people who get handouts. These people will vote for her. She could care less about the US, she cares about her own power.
Trump is already a billionaire who doesn't need the lousy job. He has plenty of power and influence and frankly being President is going to be a PITA for him from a business standpoint since things have to go in a blind trust and etc. etc. Trump actually wants to see opportunity back in America. He is an excellent leader & executive but a lousy politician because politicians have to pander in order to get elected.
Hillary will suck at leading but is a good politician and an exceptional panderer (she simply has too much dirty laundry to hide all her lies and faults since she is SO established politically.)
As far as getting the US back on track it is very simple. Slash corporate tax rates. Jobs are created by companies who factor two enormous things into decision making. Those two things are political stability and economic viability. Right now the US is politically stable (one of the most stable in the world) but economically hostile to employers and serious capital investment. So companies go elsewhere in the world to benefit from economic advantages despite political risk (China, India, Russia, etc.)
Small businesses that can't go elsewhere get crushed under the onerous tax burden.
For the US to compete the US has got to become economically viable again and not economically hostile. If corporate tax rates were seriously reduced and the US became economically enticing from a policy standpoint and capital investment climate, you would see capital and jobs flowing back into the US to take advantage of the inherent political stability in combination with economic viability so fast that there would not be enough workforce to keep up with demand. This was the essence of Reaganomics or "trickle-down economics" in the 1980s.
If Trump gets elected he is going to try and get some Reaganesque policies through. He gets my vote for that reason alone although I think he is the best person for the job in many ways. But Hillary will not go down without a fight and the dead in Chicago will probably each vote at least thrice.