Q:  What describes the deportation of undocumented immigrants under the Trump administration?
     (1)  A military operation
     (2) Not a military operation
     (3) Both of the above

A:  (3) is correct. Trump said "it's a military operation."  Homeland Security Secretary John Kelly said, "There will be no use of military forces in immigration."  In other words, according to the Trump administration, it will be a military operation without the use of military forces.