The stock market almost always follows the actions of the Federal Reserve. Look at how well the market has done under some awful presidents (Obama). There was a really bad recession in (the great) Reagan’s first term. Bubba Clinton manipulated the strength of the dollar to attract capital from overseas and the market did well (too well).
So just because Trump may be one of the better presidents, that doesn’t mean the stock market will do well.
I think if Trump is elected, the DOW will tank since the billionaire elitists like Soros will collude to perform a massive sell-off to wreck the economy for Trump.