Globe and Mail: Nancy Pelosi would like to see the United States buy less of what Canada is selling. At a luncheon at the U.S. ambassador’s Ottawa residence on Thursday, the powerful Speaker of the House of Representatives said she is committed to reducing her country’s dependence on fossil fuels — and that includes Canadian crude oil and natural gas. In a casual post-meal conversation with a group that included Laureen Harper, the wife of the Prime Minister, Ms. Pelosi remarked pointedly …