Wisconsin Republican Gov. Scott Walker on Friday urged President Trump to walk back his proposed steel and aluminum tariffs, warning that they would do more harm than good.

“If the president wants to protect good-paying, family-supporting jobs in America, especially here in Wisconsin, then he should reconsider the administration’s position on these tariffs, particularly on ultra-thin aluminum. As I described to U.S. Secretary of Commerce Wilbur Ross last year, there is not a market in America that can support the demand for ultra-thin aluminum for employers here in Wisconsin and across the country,” Walker said in a statement.