David Smick, Columnist

Trump Needs a Strong-Dollar Policy -- and Fast

A soaring greenback could affect the value of global debt, the cost of energy and even the stability of the banking system.

Turbocharged.

Photographer: Luke Sharrett/Bloomberg
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At the beginning of February, President Donald Trump reportedly called his national security adviser Michael Flynn at 3:00 a.m. to ask whether a strong dollar was good or bad for the economy.

He was right to ask: The Trump dollar could strengthen significantly and become a global economic and financial headache -- and trip up the president's entire economic policy.