US President George W Bush will take part in a summit of North American leaders this month in Mexico, the White House said Thursday, dpa reported. Bush, President Vicente Fox of Mexico and Canada's newly elected conservative Prime Minister Stephen Harper are expected to discuss border security and trade between the three nations. The March 30-31 summit will be the first time Harper meets Bush and Fox since his election in January, which ended 12 years of rule by Canada's Liberal party. ---SP 21 55 Local Time 18 55 GMT