A woman could be Mexico’s next leader. Millions of others continue in shadows as domestic workers.

Concepcion Alejo is used to being invisible.

Alejo, 43, touches her face up with makeup on a Tuesday morning, and steps out of her tiny apartment on the fringes of Mexico City. She walks until the cracked gravel outside her home turns into cobblestones, and the campaign posters coating small concrete buildings are replaced with the spotless walls of gated communities of the city’s upper class.

It’s here where Alejo has quietly worked cleaning the homes and raising the children of wealthier Mexicans for 26 years.

Alejo is among approximately 2.5 million Mexicans — largely women — who serve as domestic workers in the nation, a