Securing the border is the least of it. Most important is interior enforcement, making sure jobs aren't available to them. Then they'll self-deport, just as Romney said.
Regarding "path to citizenship," they DON'T CARE about citizenship. They DON"T CARE about voting. And there's no reason to think they want to serve on juries.
All they care about is to be worry-free concerning deportation to their hellholes of origin.
So anything, including that legalizes their presence here amounts to amnesty, no matter what euphemism they cook up for it. And that's game over for the United States as a First World country.
Don't be fooled about whether or not there would be a "path to citizenship" -- it's a phony issue.