President Trump followed up on a key campaign promise last week and formally notified Congress of his intent to renegotiate the North American Free Trade Agreement.
Some economists say there's more of a downside than an upside to opening up the landmark deal, especially for Michigan.
Charles Ballard is an economist at Michigan State University. "My advice to anybody talking about renegotiating NAFTA, if you have to use a scalpel, use a scalpel. Please don't use a meat ax," Ballard said.