Cindy McCain, the widow of Sen. John McCain (R-AZ), ripped a proposal by President Donald Trump to erect a wall on the U.S.-Mexico border to blunt the flow of human trafficking in an interview airing Friday.

“The people that are coming over the border, for the most part, are not trafficked individuals,” McCain told NBC News reporter Cynthia McFadden. “It’s people within our own walls, in our own borders, so a wall is not going to fix this, but education will and awareness will and strengthening our laws will.”