Andres Manuel Lopez Obrador, who is challenging the results of the July 2 election, alleging vote-rigging, declared himself president in a TV interview and said his supporters would step up a campaign of civil disobedience next week.
The leftist, who lost to conservative Felipe Calderon by a tiny margin, said a rally Sunday in Mexico City would show that his backers had the energy to keep up protests.
"I am already president. I won the presidential election. I am president of Mexico by the will of the majority of Mexicans," Lopez Obrador said on Univision's "Here and Now" show.