Dreamers, by definition, were brought to this country as small children, and the US is the only country they have effectively ever known. At this point, there is nothing else to do but to give these young people a path to citizenship and a way to come out of the shadows.
People who demonize immigrants, and blame them for the ills perpetrated on them by corporations that take advantage of workers AND the undocumented while twisting laws and the tax code to their (the corporations') advantage are chumps. Want to stop illegal immigration? Penalize those that hire them, not individuals trying to make a better life for themselves. Start doing that, and watch how fast the laws are changed!