I don't expect a huge amount of consistency among polls in different states, even neighboring states like Pennsylvania and New Jersey. But the polls we have seen thus far show a great degree of consistency on several questions:
- Who does better against Trump: Clinton or Sanders?
- How do the number in a two-way contest compare with a four-way?
- How bell-shaped is the ideological curve of the respondents? (The bulk of respondents self-identify as Moderate, with fewer as Somewhat Liberal or Conservative, and even fewer as Very Liberal or Conservative. This is hard for a Libertarian to answer if those are all the choices.)
Stein's 3% is reduced to 1% in a four-way race with Sanders, Trump, and Johnson.
Here is the question on which all the media coverage should focus, however: