Well, here is an ad against Cruz https://www.washingtonpost.com/news/post-politics/wp/2016/01/20/in-new-hampshire-rubio-sets-the-standard-for-negative-ads/ it's kinda funny to me. I think a small change is going to happen in this upcoming primary season, and possibly the presidential next year. That change is that people are going to stop freaking out about socialism. Younger people today, who truly have had much handed to them from indulgent parents and who have also had instant access to everything thanks to technology gains, are not going to buy that what is best is for everybody is no holds barred, only the strong survive, capitalism. While they run ads like this, and come at Bernie for socialism as well, there are probably going to be side discussions about what modern socialism means versus Soviet, soul crushing enslavement.
It is possible to have freedom, and limited socialist policies that provide some stability for everyone. And of course there is a dead opposite view of this. The more socialism is attacked and subsequently defended, the less younger people are going to keep freaking out about it.