The leading candidates in Mexico’s presidential election have held their final campaign rallies ahead of the vote on Sunday. Either Claudia Sheinbaum, a close ally of left-wing incumbent Andres Manuel Lopez Obrador, or Xóchitl Gálvez, a former senator for the country’s main centre-right party, is almost certain to become the country’s first female leader. Ms Sheinbaum, the clear favourite, told a crowd in Mexico City’s central Zócalo Square that Mexico had “changed profoundly for the better” since President Obrador was elected in 2018. “I’m clear that my obligation is to take Mexico…