Mexico mourns political activist's death while choosing new leader

The murder of a political activist shortly before polls opened Sunday highlights the brutal violence and endemic corruption that have galvanized voters, with anti-establishment leftist Andres Manuel Lopez Obrador looking poised to sweep to power.Flora Resendiz Gonzalez, a Workers Party activist, was shot at her home shortly before polls opened.The killing darkened what was already considered to be the most violent electoral campaign in Mexican history, with at least 145 politicians killed since