Stocks tumble amid trade war fears with China

Once again, fears about a possible trade war hit Wall Street hard Friday. The Dow fell more than 570 points, or 2.3 percent. "There is the potential of a trade war," said Treasury Secretary Steven Mnuchin. That prediction sent stocks tumbling.

"We know that there could be some fluctuation, but at the same time the president has said enough is enough," said Press Secretary Sarah Sanders. "China has to change this illegal and unfair practice that they've been in."

The White House is now threatening China with tariffs on $150 billion in imports, $100 billion more than its initial proposal .

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