Trump's plan to use the military for mass deportations faces sharp legal limits. The administration's few options come with major potential blowback.

Several sanctuary cities say they will not aid President-elect Donald Trump with the mass deportations he has vowed to carry out once he gets to the White House. City leaders say that Trump does not have the authority to force local law enforcement to comply with the deportations.

In the aftermath of Donald Trump’s election to a second term as president, attention has turned to his highest-profile campaign promise: the mass deportation of millions of undocumented immigrants living in the United States.