As the commander of about 1,000 military personnel spread over several states and different service branches, General Kelly oversaw an organization with a role similar to that of the department he has been chosen to lead.
General Kelly is expected to be easily confirmed by the Senate Homeland Security Committee, and then by the full Senate. He would be the first noncivilian to head the department since it was created in response to the Sept. 11 terrorist attacks.
The department has been troubled by low morale and overlapping or conflicting missions among its various agencies.
But General Kelly’s biggest challenges might come from within the new Trump administration, particularly over the threat posed by Russia and over Mr. Trump’s plan…