A global market sell-off that began last week accelerated Monday with the Dow Jones Industrial Average dropping more than 1,500 points in afternoon trading.

The slide came alongside growing concern that an economy juiced by a massive corporate tax cut, and already at full employment, could overheat and require forceful action from a new and untested Federal Reserve chairman - installed by Trump - to cool things down. The result: a president who tossed aside traditional presidential caution in cheerleading the stock market now stands poised to take the blame for any correction.