Mexicans make up half of immigrants living illegally in the U.S. The country could be the most vulnerable to a new Trump policy to deport the undocumented.

Immigrants, their employers and groups who work with them are already taking action ahead of President-elect Donald Trump’s second term, in which he has promised to deport millions of people.

President-elect Donald Trump made the border and immigration a key focus of his campaign, and promised to conduct mass deportations.

Mexican President Claudia Sheinbaum said she's working to protect Mexicans’ rights in the U.S. by robustly staffing state-side consulates.

President-elect Donald Trump has made tougher immigration enforcement a key campaign promise in each of his White House bids. If he follows through on his pledge for mass deportations and tighter immigration policies,

President-elect Donald Trump’s incoming border czar Tom Homan has pushed back against critics, claiming that “legal immigrants are perfectly safe” from the administration’s mass deportation efforts. Trump has pledged to deport tens of millions of undocumented migrants,

NewsNation spoke with migrants in a shelter who recently arrived in Piedras Negras and made appointments on the CBP One App to enter the U.S. legally. They said they felt lucky, but fear deportation once Trump takes office.