There are two options:
Parents who enter the country illegally are incarcerated and separated from their children.
-or-
Parents who enter the country illegally are incarcerated and their children are incarcerated with them.
The left needs to choose one. There is no third option.
Obama took the third option.
Let them all go free together but tell them sternly that they must show up at their immigration court hearing.
...which they usually dont..
There is a third option.
The invaders are fingerprinted, photgraphed, retinal scanned and then chucked back across the border and told in no uncertain terms that if they EVER attempt to enter the United States again, legally or illegally, they (and everyone with them) will be shot as invaders.
When some come back, verify who they are and then shoot them. no trial needed. Only defending the borders against enemy attackers.