DACA stands for Differed Action...

https://www.uscis.gov/humanitarian/consideration-deferred-action-childhood-arrivals-daca

It's called prosecutorial discretion. It does not require a new law.

Read the above link. Learn some stuff. It is not as simplistic as you seem to view things. A "just deport 'em" stance is every bit as clever as any other zero tolerance policy, which is to say not very.