Left wing candidate reluctantly signs Civility Pact vowing to accept elections' outcome.

Lopez Obrador will not accept coalition governments if elected, he said in Washington.

Leftist groups claim no ill will between presidential hopefuls Lopez Obrador and Ebrard.

Work Party contemplates alliance for incoming elections in spite of Obrador's refusal.

State of Hidalgo coalition has designated Xóchitl Gálvez as single candidate against PRI for governor elections.