Marcelo Ebrard and Cuauhtémoc Cárdenas appeared with Silvano Aureoles Conejo, PRD's candidate for governor of Michoacán, for the campaign closing in Morelia, the state capital.
As this article in Milenio does a good job of outlining, this is truly a three-way race: PAN, PRI, and PRD all have a good chance of winning. PRD has the most extensive party structure and base, though it is hampered by the unpopular government of Leonel Godoy. PRI has the most money, and has been pouring in resources into the state, which it earlier declared as essential to winning the 2012 presidential race. PAN has the least developed party organization in Michoacán, but the candidate is president Calderón's sister, with big name recognition, and PAN has also dedicated enormous resources to win here, including repeated appearances by all its 2012 contenders. The PRD has complained that they have been competing not against a candidate, but against the federal government and its resources.