In recent weeks, that has been an uneasy feeling for investors. President Trump has levied tariffs on imports from places such as Canada, Mexico and China.

President Trump thinks tariffs safeguard U.S. interests.

The specifics of the tariffs — matter. For example, imports from Canada and Mexico now face a 25 percent tariff, and China gets hit with an extra 10 percent.

Tariffs can change the economy for many reasons.

Some industries feel the pinch more than others. The automotive sector faces hefty tariffs that could spike production costs.

Tariffs spark debate. Critics said they can hurt both local and international economies.

With the future in view, the possibility for retaliation is real. Other nations could retaliate with their own tariffs, triggering trade wars.