REGINA - Saskatchewan Premier Brad Wall is wading back into the debate over proposed protectionist Buy American measures.
Wall says the job-creation bill from President Barack Obama will threaten jobs and economic development on both sides of the border.
The legislation requires public infrastructure work be done with U.S.-made materials.
Wall says protectionist measures caused more harm than good during the Depression and the hurt now would be more severe because the economies are highly integrated.
The premier has written a letter to leading senators and speakers of state legislatures asking for help to defeat the bill before Congress.
Wall, who is on the verge of calling a provincial election, spoke out against similar Buy American provisions in 2009.
Ottawa fought for more than a year to secure a Canada exemption, but that deal doesn't apply to the second round of stimulus being proposed by Obama.