Who's ahead in the New Jersey gubernatorial polls, and how accurate have they been historically?

Polling average margin in New Jersey's gubernatorial election, as well as the number of general-election polls in the final 21 days before New Jersey gubernatorial elections since 2001, their weighted-average error, and weighted-average bias

Note: Note: To avoid giving undue weight to an individual pollster, polls are weighted by one over the square root of the number of polls that their pollster conducted in that particular cycle.
Source: DDHQ, FiftyPlusOne, Race to the WH, VoteHubGet the dataDownload image