I'm sure a lot of disgruntled Republicans and Democrats unhappy with the choices are "parking" their votes with them as sort of a protest. But when they get behind that curtain on election day, they are going to hold their noses and vote their party's nominee in.
As you can see, Trump has much more to gain than Crooked Hillary. To be generous, I'll give Johnson 2% and Stein 1%. That would pretty much give Trump a 46-41% advantage in this poll.
But I don't agree with the weighting of it. They probably still have D+9 or something ridiculous like that. The 2012 actual election was D+6 and no way does Crooked Hillary outperform Obama! These pollsters are dreaming.
Out of the entire US...to dig up people who are disgruntled against both Hillary and Trump....I doubt if the grand total exceeds 500,000 votes...nation-wide.