The right-wing PAN opposition party has called on supporters to boycott the election, branding it a "vulgar fraud," but Sheinbaum has vigorously defended her predecessor's reform and her party has sought to mobilize the grassroots vote.
"We call on you to participate, participate, participate," Sheinbaum told a press conference on Friday, saying this would help significantly improve the current judiciary. "Participating is the best way to transform a country."
Besides mandating the popular election of judges, the judicial reform, promoted last year by former President Lopez Obrador, also reduced the number of Supreme Court judges, shortened terms and eased some requirements such as minimum age and work experience.