Trump's threat to make Mexico pay for the wall with a 20% tariff on all goods coming in from across the border portends—at least—a trade war with the third biggest US trading partner.
President Trump signed two executive orders on immigration—withholding funds from "sanctuary cities" and directing construction of a wall along the Mexican border.
Gen. John Kelly, Trump's choice for Homeland Security secretary, is ex-chief of the Pentagon's Southern Command who clashed with Obama over his hardline views.
Joe Arpaio and Rudolph Giuliani, short-listed for Homeland Security secretary, both have extensive experience in running detainment camps for undocumented immigrants.
A federal judge ordered Arizona's Sheriff Joe Arpaio to be tried for criminal contempt over continuing his immigration patrols in defiance of court orders in a civil rights suit.
As Immigration and Customs Enforcement launched a new wave of deportations of Central American migrants, protests against the raids were carried out across the country.
Border Patrol agents rush through interviews with Central Americans seeking to flee gangs and then send them home to the "threat of murder, rape and other violence."
John McCain prompted testimony from a Homeland Security official that ISIS could seek to infiltrate the US through Mexico. The media jumped on it, but there's nothing there.
A protected witness testified to Mexican prosecutors that members of the US Border Patrol collaborated with the Sinaloa Cartel in arms trafficking to the criminal network.
US officials designate the arrival of unaccompanied children at the border a security problem–and scramble to shift blame from Washington's own failed "drug war."
Tamaulipas state police resuced 73 abducted migrants outside Reynosa after following their apparent captors to a house and hearing frantic calls for help.
Thousands of migrants continue to be killed or kidnapped each year as they try to cross Mexico to the US; activists say Mexican officials are involved in some of the crimes.
