Campaigning has begun for the Buenos Aires city mayoral race. Although a dozen coalitions are fielding slates, the main battle lines will pit supporters of President Cristina Fernandez's progressive policies against the neo-liberal backers of current Buenos Aires mayor Mauricio Macri. The outcome of the race in the country's capital and largest city could set the trend for national elections scheduled for later this year. Leonel Poblete reports from Buenos Aires. teleSUR