This is by far the biggest threat that Trump poses to the stock market By: MarketWatch July 31, 2017 at 12:47 PM EDT The likelihood of a constitutional crisis is low, but it would be devastating, says Nigam Arora. Read More >> Related Stocks: Apple Applied Optoelect Avis Budget Group Block Inc Discovery Communications Facebook Hertz Global Holdings Inc NVIDIA Corp Paypal Holdings PowerShares QQQ Russell 2000 Ishares ETF SPDR GOLD SPDR S&P 500 ETF Trust Silver Trust Ishares Tesla, Inc. United States Steel Corp Vaneck Gold Miners ETF Vaneck Junior Gold Miners ETF