Dow tumbles 1,000 points as Trump's Powell attacks add to investors' concerns: Live updates CNBCUS stocks tumble and dollar hits three-year low as Trump continues to bash Fed Chair Powell CNNTrump: 'Loser' Powell waiting too long to cut rates NBC NewsTrump Issues Huge Fed Challenge—Sparking Stock Market Plunge As Gold And Bitcoin Price Soar ForbesTrump Renews Call for Rate Cut, Slams Fed Chair WSJ