You can tell me that the margins are lower for Clinton than they were for Obama in 2012. That's absolutely true and I recognize that. But, Trump is polling very, very badly in NY and CA. Romney had an average of 35% and 38% in NY and CA respectively. Trump has 30% in both, that's very low.
Let's look at California, for example. Romney in 2012 got 37% of the vote, while this poll has Trump at 35%. However, Clinton has dropped from Obama's margin by 3%. This means that, proportionally speaking, Trump is actually doing better. I do concede that in terms of raw votes, he's currently down but this is made up for by Clinton being down even more.