MEXICO CITY – Mexico’s presumed president-elect began forming his transition team Tuesday and announced plans for a victory lap through Mexico, while his opponent finished filing a legal challenge alleging election fraud.

Both ruling-party candidate Felipe Calderon and his leftist rival, Andres Manuel Lopez Obrador, claim they won the July 2 presidential race.

Calderon asked his campaign director to reach out to other political parties and help build a coalition government.

“We have begun working toward the transition between the administration headed by President Vicente Fox and the administration I will have the honor of leading starting Dec. 1,” Calderon said.

Calderon said his National Action Party would finance his nationwide tour to build unity after the divisive results, and shrugged off fears his presence could provoke a violent reaction in Lopez Obrador strongholds.

“I will tour the country, first in my role as winner of the election, which I won in part because of the votes of those states in the south,” said Calderon, who spoke in front of a newly designed presidential-style logo featuring his name and the red, white and green of Mexico’s flag. “I will build a climate of reconciliation.”

Meanwhile, a legal team for Lopez Obrador finished handing over boxes of videos, documents and recordings that it said showed that fraud and illegal campaigning had given Calderon a razor-thin advantage of fewer than 244,000 votes out of more than 41 million cast.

Mexico’s Federal Electoral Tribunal must rule by Sept. 6 on appeals of election irregularities before declaring a president-elect.

The leftist candidate’s supporters plan to march on the capital, starting with protests in outlying cities today and culminating with a mass demonstration in Mexico City on Sunday.