Mexican leftist Lopez Obrador leads presidential race polls

Mexico presidential candidate Andres Manuel Lopez Obrador of the National Regeneration Movement (MORENA), gives a speech as he presents his manifesto in Mexico City, Mexico, November 20, 2017. REUTERS/Henry Romero

(This November 22 story corrects deadline for parties to register candidates in eleventh paragraph)

MEXICO CITY (Reuters) - Mexican leftist presidential hopeful Andres Manuel Lopez Obrador showed leads over potential rivals in two newspaper polls published Wednesday, shortly after he unveiled key policies of his campaign platform ahead of next July's election.