PHOENIX — The Trump administration announced children of some U.S. military members overseas won't be automatic citizens, starting October 23.

The new policy appears to target naturalized service people who haven't lived in the U.S. for a required amount of time.

Department of Defense spokeswoman Lt. Col. Carla M. Gleason said in a statement that the department worked closely with USCIS and "understands the estimated impact of this particular change is small."

Agency acting director Ken Cuccinelli played down the changes in a Twitter statement, saying the update doesn't deny citizenship to children of government workers and military members.

He also said it doesn't affect most military members who are American citizens but does make it harder for those who are legal permanent residents. 

The announcement came with some confusion on the particulars. We spoke to Attorney Jason Finkelman to clear things up. Click the video above to learn more about the changes.