My personal opinion is that we should give current illegals a simple path to citizenship while updating our laws (directly and tangentially related) while truly securing our southern border. Then moving forward we strictly enforce the laws; zero waivering.
There are a lot of people who will pretend it's either 1. Not an issue at all and/or 2. It's racist to argue the point. I know I've argued from both of those positions to a certain degree in the past. (I think a lot of the anti-immigration crowd is racist and I think legal immigration is an essential part of America's success).
I think when we just focus on Immigration as an isolated topic we do the debate a disservice.
If you address the greater narrative of the ill effects, source, and potential of illegal immigration by including America's path toward oligarchy, the War on Drugs, and our ""free" trade" agreements like NAFTA, TPP, TTiP, and TiSA you start to see the full picture.
I support Bernie Sanders.
Here is his official policy on Illegal Immigration.
https://berniesanders.com/issues/fair-and-humane-immigration-policy/
I'm not in lockstep with him here, and I don't like that he doesn't have a proposal to stem illegal immigration.
When I see the GOP speaking to immigration I see it as just fanning the flames of bigotry with zero intentions of addressing the issue. It's their Gay Marriage 2016 distraction platform. When I see the Dems talking to it it's more of an open border mentality, which I'm sure the GOP will adopt eventually as "a means to become relevant again".
Here is more Bernie, he addresses where we're going if we don't make changes right at the beginning.