DES MOINES, Iowa (AP) — Iowa Sen. Charles Grassley says Congress won’t consider a new trade deal with Mexico and Canada until President Donald Trump lifts tariffs that have prompted other countries to take actions that have hurt U.S. farmers.

Speaking Wednesday on a call with reporters, Grassley said Trump must end steel and aluminum tariffs before Congress will ratify a United States-Mexico-Canada trade agreement. Farmers in Iowa and across the country have been hurt by reciprocal tariffs placed on agricultural products, including pork and soybeans. Grassley says tariffs also could hinder efforts at a trade deal with China.

Grassley, who expects to meet Thursday with Trump to discuss trade, says tariffs are “keeping the president from being on the cusp of a big win” with Canada and Mexico and just weeks away from a victory in trade negotiations with China.