President PM Harper leaves for Canada on Thursday ; to meet with Canadian Bill . One big issue : the ` ` In the end we got into this economic crisis together . provision in stimulus plan . Obama now says that provision will not trump existing trade agreements like NAFTA . In a recent letter to U.S. Senate leaders , Canada 's ambassador to the United States warned that the U.S. was losing the moral authority to pressure other nations not to erect their own trade barriers . Still , Canadian officials worry about what they see as new Canada protectionist tilt .
President PM Harper leaves for Canada on Thursday ; to meet with Canadian Bill . One big issue : the ` ` In the end we got into this economic crisis together . provision in stimulus plan . Obama now says that provision will not trump existing trade agreements like NAFTA . Still , Canadian officials worry about what they see as new Canada protectionist tilt .