(Cardinal Marc Ouellet celebrates Mass at the Santa Maria in Transpontina church in Rome, Sunday, March 10, 2013. Canada's Ouellet once said that being pope \"would be a nightmare.\" He would know, having enjoyed the confidence of two popes as a top-ranked Vatican insider. His high-profile position as head of the Vatican's office for bishops, his conservative leanings, his years in Latin America and his work in Rome as president of a key commission for Latin America all make him a favorite to become the f)