In an interview with the Denver Post Mitt Romney has indicated that he will not revoke deferred action for individuals that have already received it.
Here is his quote:
"The people who have received the special visa that the president has put in place, which is a two-year visa, should expect that the visa would continue to be valid. I'm not going to take something that they've purchased,"
"Before those visas have expired we will have the full immigration reform plan that I've proposed."
So much for the argument that you should vote for Obama to save DACA.
As for the Romney's future plans for immigration reform:
"I actually will propose a piece of legislation which will reform our immigration system to improve legal immigration so people don't have to hire lawyers to figure out how to get here legally,"
"The president promised in his first year, his highest priority, that he would reform immigration and he didn't. And I will."