For Carrin Harris, CEO of Michigan-based manufacturing company Blitz Proto, the tariffs have already created significant challenges. Her company, which makes prototypes for products including toys, medical devices and car parts, has been grappling with rising costs since January.

The U.S. officially began levying higher taxes on imports from dozens of countries Thursday, four months after President Donald Trump first announced plans to impose tariffs on most of the world while seeking new trade agreements across the board.

The U.S. has begun officially levying higher taxes on imports from dozens of countries Thursday, four months after President Donald Trump first announced plans to impose tariffs on most of the world w