corporations and wealthy have had an impact. These companies were already sitting on piles of money so a tax break did not make them go out and start spending. The GOP was warned that this great tax break would add trillions to the debt. The tax money is not coming in. Meanwhile Trump wants to spend billions more on defense-much of it appropriate. There is a shortfall so the government has to borrow money which drives investors out of the market.
Also, as predicted, with a shortfall the GOP will now have to start pushing "reforms" in social security, welfare, etc.