Story doesn't pass the smell test.
Her posting was deliberately vague, trying to be emotional without giving any facts as to why the big, bad immigration agent took away her green card.
You can only be outside the US for one year on a green card, or you lose it. Her daughter was probably asked how long she had been outside the US, and truthfully answered more than one year. It wasn’t a trick question - the only trick was that her daughter didn’t know she was supposed to lie :)
There’s a form you have to fill out before you leave the US if you want to be outside the US for more than a year on a green card - her daughter probably didn’t do this.
Ilana Mercer is just trying to gin up sympathy, without posting the real facts.