I have often wondered... if Trump thought there were kids under the White House why wouldn't he have taken care of it immediately? I have spent the last couple of nights researching the tunnels under DC and I believe I have come up with plausible answers.
My research revealed some unbelievable facts that make me understand Trump's wish to dismantle the whole of DC!
I believe that Trump discovered what I did...that there are tunnels that connect the White House to just about every corner of DC, including close to the homes of Congressmen and Women.
The tunnels are finished beautifully, with stores, post offices, barber shops, restaurants and of course the railways. There are some that are ugly and old, but still accessible. All the tunnels are connected in one way or another including to the White House and the Capital.
Obama's mansion and the Podesta mansion are connected via tunnels also. I think Trump and the military used the tunnels to find the children and transported them to the tunnels under the White House.
I will give you links to some of my research - the first one will open your eyes and you will find the reading interesting as well as disturbing.
Obama & Podesta Tunnels.
https://ellacruz.org/2018/05/10/inside-obamas-kalorama-mansion-secret-tunnels-and-a-war-room/
Origins...
https://wearechange.org/theres-hidden-network-tunnels-underneath-washington-dc/
Some mapping...
https://www.bloomberg.com/news/articles/2018-10-30/mapping-all-the-tunnels-under-washington-d-c
Glad I could help. I thought the children coming out of the White House like that at night was really weird.