A Texas mother -- if you can call her that -- booted her young son from the house after he "voted" for Donald Trump at school, and now folks are calling for a child services investigation.

The video is sickening ... the unidentified mom is presumably trying to teach her boy a lesson, but clearly goes too far. Even worse, she recorded the crying kid's ordeal and posted it on the Internet.

Unclear if she truly left the preteen out on the street, but it doesn't even matter. You can tell he and his little brother are traumatized.