President-elect Donald Trump’s incoming deputy chief of staff Stephen Miller argued Trump’s plans to secure the border would be “the biggest domestic policy win” in 50 years, adding that it would finally accomplish what Republicans have spent decades saying they would do.

Stephen Miller, who was chosen by President-elect Trump to be his deputy chief of staff for policy, said mass deportations will be Trump’s first priority. Miller joined Fox News’s “Sunday Morning

"With Donald Trump, this is something that is going to happen," the incoming White House deputy chief of staff for policy said.

Stephen Miller, the incoming White House deputy chief of staff for policy, on Sunday gave new details on the Trump administration's plan for what he called "the largest deportation operation in American history.

Stephen Miller, an influential adviser to President-elect Donald Trump, has revealed that the incoming administration will close the border down and begin mass deportations of illegal immigrants on the first day in office.