However, it would be really difficult, time consuming, and expensive for them to revoke EAD's and and Deferred Action for those that already have it. The easiest thing they could do is simply end the program and not allow us to renew.
But this is not likely to happen until Obama leaves office. And prolly wont even under a republican president. The political shitstorm would not be worth it. We're not the ppl the want to kick out.