Changes to hiring and retention practices grew the department by 19,000 people in four years. But former officials warn that's still not enough for Trump's ambitious policy goals.

The job has proved fiendishly difficult in the Trump era. During his first term, the president cycled through no fewer than six Homeland Security chiefs.

Security remains the top priority when it comes to major events like the Super Bowl coming to New Orleans after the Bourbon Street attack.

The Secret Service is already in New Orleans ahead of President Trump's visit for Super Bowl Sunday, New Orleans Police Chief Anne Kirkpatrick tells Axios exclusively. Why it matters: Security was a top focus in the city after the New Year's Day terrorist attack,