082619 404 A pending trade deal with Canada and Mexico is generating some bipartisan support in a political climate that is often seen as deeply divided. That’s the message from a Republican U-S senator and a former Democratic agriculture secretary. Tom Vilsack toured the Anderson Erickson Dairy in Des Moines with Sen. Chuck Grassley today (Monday). The two say they share a commitment to improving and modernizing trade with Mexico and Canada. Another Iowa Democrat has entered the primary race to