Polls closed in a national vote in Mexico on Sunday that is set to give Mexico its first female president. Claudia Sheinbaum has led in exit polls over her primary opponent, Sophie Galvez, as the head of the country’s ruling Morena party. Election day in Mexico was marked by violence as town council candidate Israel Delgado was shot dead by two hitmen aboard a motorcycle in the township of Cuitzeo. Residents voted under a heavy police guard — but later passed by the home of murdered candidate Israel Delgado to light a candle for the well-known local politician at an improvised altar on his doo…