Wall St. set to open lower amid uncertainty under Trump

Pledging to put "only America first", Trump laid out two simple rules after taking oath on Friday - buy American and hire American. Wall Street hit a series of record highs after Trump's election in November as investors expected the economy to get a boost from his proposals for tax and regulatory reforms and higher infrastructure spending. "From the standpoint of moving the market, Donald Trump is going to be a trader's dream because he will create market swings, choppy trading and erratic beha