Protecting Trump in a second administration presents unprecedented security challenges

As Donald Trump conducts a free-wheeling transition from his Mar-a-Lago estate, drawing flocks of business moguls, contractors, foreign dignitaries and anyone looking for jobs in the new administration, the federal agencies charged with protecting the president-elect and his communications face a daunting task.

​ As Donald Trump conducts a free-wheeling transition from his Mar-a-Lago estate, drawing flocks of business moguls, contractors, foreign dignitaries and anyone looking for jobs in the new administration, the federal agencies charged with protecting the president-elect and his communications face a daunting task. Read More Breaking News, Latest News and Videos | CNN